Mercury outboard compression chart - 5.7L V10 Mercury® 5.7L V10 350 and 400hp Verado® outboards continue the legendary Verado engine family’s legacy of providing premium marine performance. With the strength of the outboard segment's first V10 naturally aspirated powerhead, they deliver extraordinary power and capabilities so you can confidently explore beyond the horizon. …

 
The piston is the part of the engine that creates the compression needed to run. If there is a crack in the piston, air can escape and cause a lack of compression. This article will discuss the steps necessary to figure out why your two-stroke engine has no compression. We will also discuss the essential functions of a two-stroke engine to .... Game dogs for sale near me

Normal atmospheric pressure is 14.7 psia at sea level. 9 x 14.7 is 132 psia or 118 psig, the latter being what your compression gauge reads. A compression reading around 200 is something you might see in a diesel engine, but not in a normally-aspirated 4-stroke gas engine designed for 87 octane fuel.Nov 1, 2006. #5. Re: Mercury 20 HP Compression. Compressions should be higher than that. aprox 120-140. Unfortunatly if the bore is scored may as well use it as a artifitial reef. These engines have a chrome bore. Precision engine rebuild will be the likely cost effective repair.Nov 1, 2006. #5. Re: Mercury 20 HP Compression. Compressions should be higher than that. aprox 120-140. Unfortunatly if the bore is scored may as well use it as a artifitial reef. These engines have a chrome bore. Precision engine rebuild will be the likely cost effective repair.Performance data you can trust from Mercury Marine. ... Outboard 500 - 600hp 175 - 400hp 65 - 150hp 2.5 - 60hp ... MODEL YEAR CHART. THRU 1996. Mercury did not publish model year information for 1997 & newer outboards. The year is now normally noted on the serial number sticker. NOTE: Mercury DOES NOT Use Model Years For Parts Lookup. This Chart Is For. Reference Only, Since Many Aftermarket Parts Manufacturers DO List Parts By Year.Evinrude Compression. Force Outboard Compression. Honda Outboard Compression. Johnson Outboard Compression. Mariner Outboard Compression. Mercury Outboard Compression. Nissan Outboard Compression. Suzuki Outboard Compression. Tohatsu Outboard Compression.Below I have listed the oil ratios recommended by manufacturers and a few tips based on my experience. 100:1 - Mix 50ml of oil per 5ltrs of fuel. Recommended by Yamaha and Suzuki for most of their small two stroke engines up to about 30hp, this ratio requires the least amount of TCW3 two stroke oil.4.6L V8 For boaters who refuse to compromise, Mercury V8 250 and 300hp Verado® outboards represent the pinnacle of superior outboard design and performance. They deliver exhilarating acceleration and top speed, with the power and reliability to make runs over long distances and choppy water. The Mercury-exclusive Advanced MidSection …MODEL YEAR CHART. THRU 1996. Mercury did not publish model year information for 1997 & newer outboards. The year is now normally noted on the serial number sticker. NOTE: Mercury DOES NOT Use Model Years For Parts Lookup. This Chart Is For. Reference Only, Since Many Aftermarket Parts Manufacturers DO List Parts By Year. The Pro Max 300X outboard from Mercury Racing cranks out more than 300 horsepower. Rated at more than 300 horsepower, Pro Max 300X is the most powerful outboard on the market. The outboard has an all-new powerhead, from its cylinder block to its high-flow fuel-injection system. The block features high-performance cylinder porting …Step by Step Instructions on how to correctly do an Outboard Compression Test on any outboard engine. I'm doing this on a Johnson 40hp outboard for this vide...Re: 2002 Mercury 150Hp xr6 Compression and overall reliability of outboard From Mercury Service manual COMPRESSION All Models – Using a fully charged battery, throttle shutters wide open and cylinder block warm 110 – 135 psi (753.3 – 924.5 kPa) Variance between cylinders should not exceed 15 psi (102.7 kPa)Place your engine’s throttle in the neutral position. 4. May sure the key is not in the ignition. 5. Using your torque wrench with a spark plug socket, carefully remove each plug. 6. NGK spark plugs come pre-gapped. If you would like to check the gap, you can do so with a gap gauge.Can view/read-out CDS on most Yamaha, Suzuki & E-Tec outboard engines, some Mercury marine and Jet Ski & Jet Boats as per our list below! YAMAHA MARINE.Evinrude Compression. Force Outboard Compression. Honda Outboard Compression. Johnson Outboard Compression. Mariner Outboard Compression. Mercury Outboard Compression. Nissan Outboard Compression. Suzuki Outboard Compression. Tohatsu Outboard Compression.Everybody hears about performing an outboard motor compression test, and everyone knows that when you buy a used boat, you should compression test the outboa...– The new Mercury Racing 450R outboard is purpose-designed for the high-performance disciple craving unrelenting power. Steeped in Mercury Racing DNA, the 450R features a 4.6-liter V8 FourStroke powerhead boosted by an exclusive Mercury Racing supercharger to produce 450 peak propshaft horsepower and 40 percent higher torque …Outboard Motors | Mercury Marine Quality, Performance, Innovation, Reliability. Outboard Motors Nobody makes a more reliable, powerful, and efficient lineup of outboard motors …Download a digital copy of a Mercury 90 horsepower two-stroke and four-stroke outboard service manual directly to your computer, tablet or smartphone in seconds. The 90 hp Mercury manual covers every aspect of maintenance, service, troubleshooting and repair. Imagine for a moment that you have found the absolute perfect fishing hole in […]Mercury Outboards Product Handbook - Mercury Marine. This pdf document provides detailed information on the features, specifications, and benefits of Mercury outboards, the world's leading marine engines. Learn how to choose the right outboard for your boat, and discover the advantages of Mercury's innovative technologies and unmatched reliability.3.4L V6 and 4.6L V8 Mercury Pro XS® outboards are engineered for those boaters who demand ultimate performance – anglers competing on the highly competitive tournament trails and powerboaters who simply crave speed and acceleration. Exclusive components and tuning extract every ounce of performance from each Pro XS model so you can take …Dec 12, 2013 · Re: 1999 90 hp 2 stroke compression numbers, My service manual, OEM Merc/Mariner PN 90-830234R3 publication date Dec. 1997 states in section 1C-6 "Important Information", Compression Check: REMOVE SPARK PLUGS. Install gauge. Hold throttle plate (carb butterflies) at WOT (fully open) A compression check can tell a lot about the health of your outboard engine. Here's why and how it's done. There are four distinct phases in a four-stroke cycle: induction, compression, power, and exhaust. A lot can be learned by checking the engine's ability to compress the gas/air mixture. (Illustration: ©2016 Mirto Art Studio)ProKicker 9.9-25hp. Quiet Performance. Precise Speeds. Complete Control. Mercury ProKicker™ outboards enable precision boat control, even in the toughest fishing conditions. Quiet, smooth and efficient, they make long hours of trolling more productive – and more enjoyable.517. Dec 15, 2011. #2. Re: Compression question - 50hp 2 stroke. Bond-O was the first one with the completely correct answer. It's the ratio between the volume when the piston is down and when the piston is up. High octane gas actually burns slower than low octane, as it is a more articulated (branched) molecule.I have a 115 hp mercury optimax (2006) with low compression in one of three cylinders. 80 psi, 115psi, 115 psi. will - Answered by a verified Marine Mechanic ... 2006 Mercury 115 hp outboard with high speed misfire at 2100rpms, under load, clean fuel filters, plugs show no signs of fouling, runs fine at 2000 rpms.Speed, fuel, depth, rpms - everything. All accurately and clearly displayed - including advanced, multi-function, touch-screen LCD displays. Compatible with all sterndrive, Verado, OptiMax, and FourStroke® engines 40 hp and above. Controls and gauges that have to face the ultimate test. Mercury engineers.Performance data you can trust from Mercury Marine. ... Outboard 500 - 600hp 175 - 400hp 65 - 150hp 2.5 - 60hp ...3. Jul 28, 2016. #1. Hello all, I have a new-to-me 2004 25 hp 2 stroke Mercury engine that seems to start and run well. During a cold engine compression test, the cylinders both hit exactly the same at 100lbs. My question is: What should the compression number be? This engine is very clean with very minimal use.7. 7. 2010 ... APPLICATION CONTINUED ON NEXT PAGE ➂ Chart is for referencing only, pistons received will be 2 ring version ... MERCURY OUTBOARD LOWER UNIT ...THRU 1996. Mercury did not publish model year information for 1997 & newer outboards. The year is now normally noted on the serial number sticker. NOTE: Mercury DOES NOT Use Model Years For Parts Lookup. This Chart Is For. Reference Only, Since Many Aftermarket Parts Manufacturers DO List Parts By Year. A "0" in front of the serial …Boating Innovations & Education! The first thing that most people think of when they hear the words, "compression test," is expensive. Is that really the case though? What Outboard Compression Test Results Mean. Results vary depending on whether the outboard is a Four-Stroke or a Two-Stroke.XL. G303046 - UP. 135. 1996. XL. G303046 - UP. MODEL YEAR CHART FOR MERCURY OUTBOARDS MODELS 115 HP - 150 HP.125ELPTO. This 125 horsepower Mercury outboard, manufactured in 2003, is a saltwater model. The engine weight is recorded at 348 lbs. This is a 4 cylinder model. The displacement for the pistons is 113. The bore for this outboard is 3.5 inches and the stroke is 2.93 inches. This engine has power steering and a electric-type starter.November 15, 2022. Mercury Marine, a division of Brunswick Corporation, today introduced the industry’s first ever V10 outboard with the official launch of its all-new 5.7L 350 and 400hp Verado® outboard engines. Consistent with the award-winning Verado brand, the new V10 engines are the quietest and smoothest in their class running 45 ...Re: 2002 Mercury 150Hp xr6 Compression and overall reliability of outboard From Mercury Service manual COMPRESSION All Models – Using a fully charged battery, throttle shutters wide open and cylinder block warm 110 – 135 psi (753.3 – 924.5 kPa) Variance between cylinders should not exceed 15 psi (102.7 kPa)Outboard Motors | Mercury Marine Quality, Performance, Innovation, Reliability. Outboard Motors Nobody makes a more reliable, powerful, and efficient lineup of outboard motors …THRU 1996. Mercury did not publish model year information for 1997 & newer outboards. The year is now normally noted on the serial number sticker. NOTE: Mercury DOES NOT Use Model Years For Parts Lookup. This Chart Is For. Reference Only, Since Many Aftermarket Parts Manufacturers DO List Parts By Year. A "0" in front of the serial number is ... This 150 horsepower Mercury outboard, manufactured in 2006, is a saltwater model. The engine weight is recorded at 431 lbs. This is a 6 cylinder model. The displacement for the pistons is 153. The bore for this outboard is 3.5 inches and the stroke is 2.65 inches. This engine has power steering and a electric-type starter.The 351 Windsor has a displacement of 351 cubic inches or 5.8 liters. The stock stroke of the engine is 3.5 inches and the stock cylinder bore is 4 inches. It has a distinct firing order from the other Ford Small Blocks, 1-3-7-2-6-5-4-8 vs 1-5-4-2-6-3-7-8. Cast out of iron, the bare block weighs in at between 150 – 200 lbs depending on the year.THRU 1996. Mercury did not publish model year information for 1997 & newer outboards. The year is now normally noted on the serial number sticker. NOTE: Mercury DOES NOT Use Model Years For Parts Lookup. This Chart Is For. Reference Only, Since Many Aftermarket Parts Manufacturers DO List Parts By Year. A "0" in front of the serial …Performing Yamaha spark plugs and compression maintenance on your outboard is one of the keys to its overall longevity and reliability. Begin this step of your Yamaha 100-hour service by removing the plastic shrouding over your spark plugs or ignition coils. Yamaha engines come from the factory with NGK brand spark plugs, and PartsVu carries a ...View and Download Mercury 6 service manual online. 6 outboard motor pdf manual download. Also for: 8, 15, 9.9, 10. ... Page 11 SPECIFICATIONS Propeller Information Chart - 6 HP Wide Open Throttle RPM: 4000-5000 Recommended Transom Height: 15 , 20 , 25 Right Hand Rotation Standard Gear Reduction: 2:1 Diameter Pitch No. Of Material …ALL OUTBOARD JETS ARE MADE TO ORDER THAT SHIPS IN APPROX 6 MONTH -Determine your outboard's year and horsepower and select correct option.The V8 Verado outboards are available in 250- and 300-hp models, and use Mercury’s Advanced MidSection to reduce vibration and noise. The Verado takes its name from the famous L6 supercharged engine it replaces, but it is not supercharged and because of its large displacement, light weight and transient spark ignition, it doesn’t need to be. skenniston said: I am looking at buying a merc outboard - 1997 250 hp EFI with an hour meter showing 178 hours. Compression check shows 100,105,100,110,105,100. What should this motor have for compression with these low hours, or am I being scammed and the motor really has 500 or more hours???Dec 26, 2015 · My 2 cents worth, mostly repeating what others have said. Most DIY compression gauges are not that accurate so don't get too hung up on the actual readings, so long as they are up there around the 120 mark and within 10 % of each other you should be good to go. The 10% rule is the most important. Mercury FourStroke engines deliver no-compromise performance, fuel-efficiency, reliability, innovative features and smoothness to ensure maximum fun, maximum confidence. Performance-inspired configuration: The four-valve, dual-overhead-cam powerheads of the new Mercury V8 and V6 outboards deliver awesome acceleration and supreme confidence.Optimax Pro XS 250 HP. HP/kW 250 / 184. Full throttle RPM 5500-6000. Cylinder Configuration V-6. Displacement (L) 3.0. Fuel Induction System 2-Stage Direct Fuel Injection (DFI) Alternator Amp 60 amp / 756 watt (Belt-Driven) Gearcase Ratio 1.75:1. Steering Big Tiller Compatible.Jul 23, 2022 · And when a head gasket wears out, it automatically causes poor compression in the cylinder. 4. Carbon-Clogged Piston Rings. The clogging of piston rings with carbon is another common cause of a low compression reading in your engine. Plus, the outboard motor or your boat goes through a constant combustion cycle. Evidence of rust or water on the spark plugs could also be an indication of a blown head gasket. compression test. Here's how to do …The best way to precisely determine the outboard motors of the right size is to follow the standard formula. Portable outboard motors. This outboard motor typically ranges from 2 to 20 HP and weighs 30 to 110 pounds (13.6 – 50 kg). Mid-size outboard motors. Mid-size models of 25 to 100 HP generally range from 155 to 360 pounds (70.5 – 163 kg).And when a head gasket wears out, it automatically causes poor compression in the cylinder. 4. Carbon-Clogged Piston Rings. The clogging of piston rings with carbon is another common cause of a low compression reading in your engine. Plus, the outboard motor or your boat goes through a constant combustion cycle.7. 7. 2010 ... APPLICATION CONTINUED ON NEXT PAGE ➂ Chart is for referencing only, pistons received will be 2 ring version ... MERCURY OUTBOARD LOWER UNIT ...Electronic Navigation Charts & Software; Digital Instruments; Display Mounts; VHF Radios & Communication ... Mercury & Mariner Outboards . Proper compression on late 90's 8hp 2S Merc? ... Proper compression on late 90's 8hp 2S Merc? A rope start should give you over 70-80psi, mchrist, with both cylinders within a …What Outboard Compression Test Results Mean. Results vary depending on whether the outboard is a Four-Stroke or a Two-Stroke. Good results for Four-Strokes should be 180-210 PSI, and Two-Strokes …3.4L V6 and 4.6L V8 Mercury Pro XS® outboards are engineered for those boaters who demand ultimate performance – anglers competing on the highly competitive tournament trails and powerboaters who simply crave speed and acceleration. Exclusive components and tuning extract every ounce of performance from each Pro XS model so you can take …1991 Mercury 200 HP 200 XRi EFI. This 200 horsepower Mercury outboard, manufactured in 1991, is a saltwater model. The engine weight is recorded at 397 lbs. This is a 6 cylinder model. The displacement for the pistons is 153. The bore for this outboard is 3.5 inches and the stroke is 2.65 inches. This engine has power steering and a electric ...Mercury engines come from the factory with the correct heat-range spark plug for your application, and PartsVu carries a wide …These motors do not have any consistent year-to-serial scheme. Mercury ceased publishing this information after the 1996 model year. There is no way to find the model year of motors with significantly higher. serial numbers than listed in these guides. There is NO serial-to-year cross-reference chart for 1997 and later motors.2002 Mercury Outboard 150 hp Salt water series 2 stroke engine. Pressure test was performed with hot and cold engine using two different tester kits. One fr...Mercury Racing’s new 450R is an outboard powerhouse. Courtesy Mercury Marine. “The 400R starts out strong, but then seems to sort of run out of breath as you build up speed,” says Mike Griffiths, who was manning an MTI 340X cat. “The 450R’s torque starts early and stays linear. This motor pulls hard all the way to wide-open throttle.”.Evinrude Compression. Force Outboard Compression. Honda Outboard Compression. Johnson Outboard Compression. Mariner Outboard Compression. Mercury Outboard Compression. Nissan Outboard Compression. Suzuki Outboard Compression. Tohatsu Outboard Compression.MODEL YEAR CHART. THRU 1996. Mercury did not publish model year information for 1997 & newer outboards. The year is now normally noted on the serial number sticker. NOTE: Mercury DOES NOT Use Model Years For Parts Lookup. This Chart Is For. Reference Only, Since Many Aftermarket Parts Manufacturers DO List Parts By Year.ProKicker 9.9-25hp. Quiet Performance. Precise Speeds. Complete Control. Mercury ProKicker™ outboards enable precision boat control, even in the toughest fishing conditions. Quiet, smooth and efficient, they make long hours of trolling more productive – and more enjoyable. 3.4L V6 and 4.6L V8 Mercury Pro XS® outboards are engineered for those boaters who demand ultimate performance – anglers competing on the highly competitive tournament trails and powerboaters who simply crave speed and acceleration. Exclusive components and tuning extract every ounce of performance from each Pro XS model so you can take …Mercury Parts Catalog. Find the right parts for your Mercury® or MerCruiser® engine here. Search by serial number to see detailed engine diagrams and part numbers, then contact your local authorized Mercury Marine dealer to place your order. You can also browse by model, but we strongly recommend using your serial number to ensure you find ...Mechanical or Tiller: 70 hp, 60 hp, 50 hp. The Yamaha 70 hp, 60 hp and 50 hp Midrange four strokes are the go-to outboards for family, fishing and fun. Light and powerful, they sport 1-liter displacement, single-overhead-camshaft designs and electronic fuel injection. They deliver quick starts, high performance and incredible efficiency for ...E-TEC Direct Injection with stratified low RPM combustion mode. Alternator Output. 133 Amps Total / 50 Net Dedicated. Steering. Remote (Tiller accessory) Trim Method. Trac-1 Power Trim and Tilt. Shaft Length - in (mm) 20 (508)The all-new Mercury 5.7L V10 350 and 400hp Verado outboards continue the legendary Verado engine family’s legacy of providing premium marine performance. With the strength of the outboard segment's first V10 naturally aspirated powerhead, they deliver extraordinary power and capabilities so you can confidently explore beyond the horizon.Re: Compression for 50 HP Merc 4 stroke. Sounds severely overpropped to me, but there isn't enough info to be sure. RPM at top speed is critically important. It should be at or near 6,000rpm and I don't see that happening at 27mph. With a 22" pitch I would expect near 40mph at 6,000rpm. To resolve it, you need a tach on your engine, at least ...Both the regular Mercury 150 and 150 ProXS were designed to be low maintenance cost effective 150s and it shows. The ProXS has low water pickups and a reasonable but not ideal gear ratio. A 1.85 would make this almost perfect for a 150 outboard. Number 2 is the Yamaha Vmax SHO 150.Outboard Motor Mercury 225 Manual. (155 pages) Outboard Motor Mercury 200 OptiMax Manual. (124 pages) Engine Mercury 200 Pro XS Operation, Maintenance And Installation Manual. (123 pages) Outboard Motor Mercury 200 User Manual. Mercury marine outboard motor user manual (118 pages) Outboard Motor Mercury 115 Optimax Operation And Maintenance Manual.Oct 31, 2006 · Nov 1, 2006. #5. Re: Mercury 20 HP Compression. Compressions should be higher than that. aprox 120-140. Unfortunatly if the bore is scored may as well use it as a artifitial reef. These engines have a chrome bore. Precision engine rebuild will be the likely cost effective repair. Mercury FourStroke engines deliver no-compromise performance, fuel-efficiency, reliability, innovative features and smoothness to ensure maximum fun, maximum confidence. Performance-inspired configuration: The four-valve, dual-overhead-cam powerheads of the new Mercury V8 and V6 outboards deliver awesome acceleration and supreme confidence.The Mercury 115 EFI four-stroke outboard is an in-line 4-cylinder that is made from the same 1.7 liter block and powerhead used in the 200-hp Verado. Many other components from its beefy big brother is used as well. The difference is that the 115 is not supercharged. But if it were, its block and head could handle the tremendous energy produced ...The Mercury 50 hp outboard motor is a 4-cylinder motor with an inline configuration. The motor's gear ratio is 2.3:1. Only three gears are available on this outboard motor -- forward, neutral and reverse. The Mercury 50 hp outboard is capable of producing 5,500 to 6,000 rpm. The total weight of the outboard motor is 255 lbs. when …I have a 115 hp mercury optimax (2006) with low compression in one of three cylinders. 80 psi, 115psi, 115 psi. will - Answered by a verified Marine Mechanic ... 2006 Mercury 115 hp outboard with high speed misfire at 2100rpms, under load, clean fuel filters, plugs show no signs of fouling, runs fine at 2000 rpms.Man, I did a compression test today on my 2000 Mercury Optimax 200hp with the throttle wide open, warm engine, and a - Answered by a verified Marine Mechanic. We use cookies to give you the best possible experience on our website. ... I have a mercury outboard 402 thunderbolt 1972 s/n 340634.Mercury's proven TwoStroke engines deliver easy starting, gutsy performance, and great all-round reliability. Across the range you’ll find an array of features that help keep your boating experiences more enjoyable and trouble-free. Features such as largest engine capacity displacement, giving you more low-end thrust, advanced carburetor ... If your outboard engine doesn't start, run rough or without much of a power, do the compression test on all the cylinders. Low pressure cylinder indicates wo...8. Yamaha Fuel Stabilizer & Conditioner. If you’re hunting for a top quality marine fuel additive, then this item is a magnificent deal that is surely perfect for Yamaha outboard. You can efficiently utilize it with every fill up and at the final term of the year to firm up the fuel for winterizing.

Replace the plugs and let it sit for a few days. Start the motor to burn it off then re-do the compression test. That might free up the rings and get you some compression. Option 2: Get a 1 gallon jug, mix a gallon of gas/oil to ratio in the jug. Pour a enitre can of Seafoam in there.. Biblehub.

mercury outboard compression chart

View and Download Mercury 6 service manual online. 6 outboard motor pdf manual download. Also for: 8, 15, 9.9, 10. ... Page 11 SPECIFICATIONS Propeller Information Chart - 6 HP Wide Open Throttle RPM: 4000-5000 Recommended Transom Height: 15 , 20 , 25 Right Hand Rotation Standard Gear Reduction: 2:1 Diameter Pitch No. Of Material …Evinrude Compression. Force Outboard Compression. Honda Outboard Compression. Johnson Outboard Compression. Mariner Outboard Compression. Mercury Outboard Compression. Nissan Outboard Compression. Suzuki Outboard Compression. Tohatsu Outboard Compression. What Should The Compression Be On An Outboard? Compression numbers are going to vary greatly, depending on certain variables. Things like whether the engine is a two-stroke or a four-stroke. How old is the engine? What brand and horsepower is the engine? Then there are also things that you wouldn't commonly think about.1991 Mercury 200 HP 200 XRi EFI. This 200 horsepower Mercury outboard, manufactured in 1991, is a saltwater model. The engine weight is recorded at 397 lbs. This is a 6 cylinder model. The displacement for the pistons is 153. The bore for this outboard is 3.5 inches and the stroke is 2.65 inches. This engine has power steering and a electric ...What Should The Compression Be On An Outboard? Compression numbers are going to vary greatly, depending on certain variables. Things like whether the engine is a two-stroke or a four-stroke. How old is the engine? What brand and horsepower is the engine? Then there are also things that you wouldn't commonly think about.How Much Fuel Does a 25-30 HP Mercury Outboard Use? You can expect the fuel consumption of 25-30 HP Mercury outboards to be roughly 2.3-3.0 gph at WOT and 1.1-1.5 gph at 4000 RPM. These motors share the same 500cc, EFI, inline-3 engine, and lower unit, except that the F25 comes with restricted engine power.If you are in the market for a new Mercury outboard motor, finding a reliable dealer near you is crucial. A reputable dealer can not only help you choose the right outboard for your needs but also provide ongoing support and maintenance.If your outboard engine doesn't start, run rough or without much of a power, do the compression test on all the cylinders. Low pressure cylinder indicates wo...Normal atmospheric pressure is 14.7 psia at sea level. 9 x 14.7 is 132 psia or 118 psig, the latter being what your compression gauge reads. A compression reading around 200 is something you might see in a diesel engine, but not in a normally-aspirated 4-stroke gas engine designed for 87 octane fuel.125ELPTO. This 125 horsepower Mercury outboard, manufactured in 2002, is a saltwater model. The engine weight is recorded at 348 lbs. This is a 4 cylinder model. The displacement for the pistons is 113. The bore for this outboard is 3.5 inches and the stroke is 2.93 inches. This engine has power steering and a electric-type starter.How Much Fuel Does a 25-30 HP Mercury Outboard Use? You can expect the fuel consumption of 25-30 HP Mercury outboards to be roughly 2.3-3.0 gph at WOT and 1.1-1.5 gph at 4000 RPM. These motors share the same 500cc, EFI, inline-3 engine, and lower unit, except that the F25 comes with restricted engine power.Mercury/MarinerEFI, 90/115 HP Command Thrust, Optimax and Verado Outboards 135-350 HP. 135-350 HP 1978 & Newer and 90/115 Command Thrust 2014 & Newer 120ELPT. This 120 horsepower Force by Mercury Marine outboard, manufactured in 1998, is a saltwater model. The engine weight is recorded at 303 lbs. This is a 4 cylinder model. The displacement for the pistons is 102.9. The bore for this outboard is 3.38 inches and the stroke is 2.88 inches. This engine has power steering and a electric-type ....

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