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1996 mercury 60 horse 3 cylinder 2 stroke

Sn# 0G298881 mercury outboard engine has spark, Good compression and fuel/oil mix but is running rough. Need an merc outboad expert on 2 stokes to give some suggestions for troubleshooting. Thanks

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Problem in the idle settings of the carby
could be rubber bits from deteriorating rubber hoses /water in the circuits but it needs attention from accredited mercury service centers

Posted on Apr 25, 2017

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WHATS THE FUEL AND OIL RATIO FOR 25HR 2CYL OUTBOARD MERCURY


need the year of manufacture as some 2 stroke units have oil injection that automatically mixes the oil in the correct ratio for engine rpms otherwise it is 50:1 ( 50 parts fuel to 1 part oil)
oil requirements --certified tc-w3 2 stroke outboard oil ---not ordinary engine oil
reference
google --type in mercury outboard oil to fuel ratio

May 07, 2017 | Mercury Boating

1 Answer

Do I use reg gas or a gas mix?


Matt, If engine is two stroke and not oil injected then yes you must mix 2 stroke oil and fuel. 4 stroke engine have a crank case which is filled to proper level with 4 stroke engine oil. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
How to Decide Between Two or Four Stroke Outboard Boat Engine

4 Stroke Outboard Motor vs 2 Stroke Outboards

2 stroke outboard Vrs 4 stroke outboard

http://www.cottagetips.com/tips/boat-motor-gas-to-oil-ratios

Apr 15, 2016 | Boating

1 Answer

White smoke delica


The thick white smoke is either burnt oil or steam you can easily identify the smell of burnt oil not really sure why you thought it would be a good idea to put a 2 stroke mixed fuel in but more than likely that alone fouled your spark plugs. But if the problem preceded the fuel blunder then your either have a bad intake/head gasket, leaking valve seats, or bad main engine seal. Replace the spark plugs and check cylinder compression. Change your engine oil and check to see if it contains water/coolant also watch for coolant or oil consumption

Apr 12, 2014 | 1996 Mitsubishi Delica

1 Answer

1976 115 hp mercury outboard motor manual


fuel goes in at connector then to fuel pump then to carbs ! remove connector off fuel line and prime fuel up so you know you got fuel ! then reconnect to engine and prime up again till you see filter filling and bulb should harden , then remove a drain screw from carb bowl and prime again and see if fuel comes out of all carb drains ! if yes then start engine with or in water with kill lanyard on if ok then good ! not then check sparks on all plugs putting them against the head for earth and crank to check ! if ok then i would remove carbs and clean the jets etc ! compressions 100psi or more on all cylinders ! less means recon pistons etc !

Jul 28, 2013 | Seloc Mercury Outboard Repair Manual, 1965...

1 Answer

L was driving my boat and the out board motor stopped l tried to start it but it smelt like it was flooded .l pulled the spark pulgs out cleaned them and tried to start the motro without the spark plugs to...


If i had year make and model I could give you detailed instruction. You can do a few simple test to make the troubleshooting easier. Tools(1) A compression gauge (2) a spark gap tester.(3) A Clymer service manual for your engine. (you can purchase from your local dealer). I know all these are expensive but if your going to be a outboard owner you will always need them. Troubleshooting (1) check compression. without the year make and model I'm giving you a average numbers. Look at your Clymer manual for exact numbers. all cylinders need to be over 100 lbs and equal each other within 5 lbs.(2) check spark. use a spark gap tester all cylinders should jump a half inch gap. if you have good compression and good spark, fuel is the problem nine times out of ten.Ethanol gas is proven to stay stable in fuel systems for only 30 days in 90 + degree heat. It turns to a gummy residue called varnish. It clogs up carberators and fuel injection system. I don't know year make and model so i dont know what fuel system you have. clean fuel lines replace primer bulb and replace all fuel filters. Yamaha has a gravity filter under engine cover clean it. mercury fuel injected outboards has a canister fuel filter under engine cover. Finally replace spark plugs, I know spark plugs probably don't look bad but this is a outboard. Fresh spark plugs means less resistance for the ignition system. The ignition system is week compared to automotive. Test drive boat, if the problem is still there then there is further steps to take. Again I don't know the year model so I guessing on fuel delivery system. Pull out your clymer manual. what is great about the Clymer Manual for Novice techs is it gives detailed info on your outboard. Troubleshooting tips and teaches you how your outboard works.

Nov 04, 2009 | Boating

1 Answer

Yamaha outboard 150 4 stroke bad vibration at 700 to 1200 rpm run great in nuetral and over 1200 rpm what could it be


is you propeller bent? a dent the size of a quarter will cause a shake. If not that means your engine is misfiring. here are the troubleshooting test and tool list you need to find out. Tools(1) A compression gauge (2) a spark gap tester.(3) A Clymer service manual for your engine. (you can purchase from your local outboard dealer. I know all these are expensive but if your going to be a outboard tech you will always need them. Troubleshooting (1) check compression. without the year model I'm giving you a average numbers. Look at your Clymer manual. all cylinders need to be over 100 lbs and equal each other within 5 lbs.(2) check spark. use a spark gap tester all cylinders should jump a half inch gap. if you have good compression and good spark, fuel is the problem nine times out of ten.Ethanol gas is proven to stay stable in fuel systems for 30 days in 90 + degree heat. Drain gas tank,clean fuel lines replace primer bulb and replace all fuel filters. Yamaha has a gravity filter under engine coul clean it. Finally replace spark plugs, I know spark plugs probably don't look bad but this is a outboard. Fresh spark plugs means less resistance for the ignition system. The ignition system is week compared to automotive. Test drive boat, if the problem is still there then there is further steps to take. Again I don't know the year model so I guessing its fuel injected. Pull out your clymer manual. what is great about the Clymer Manual for Novice techs is it gives detailed info on your outboard. Troubleshooting tips and teaches you how your outboard works.

Nov 03, 2009 | Boating

1 Answer

Skipping, lack of power, 4 stroke mercruiser


has your boat been sitting more than 60 days. ethanol gas has been proven to only stay stable for 30 days in 90 degree + weather. Labor cost can be up to $100.00 per hour. CHEAP TEST- compression, spark, and fuel. TOOLS(1) A compression gauge (2) a spark gap tester.(3) A Clymer service manual for your engine. (you can purchase from your local dealer). I know all these are expensive but if your going to be a outboard owner you will always need them. TROUBLESHOOTING (1) check compression. without the year model I'm giving you a average numbers. Look at your Clymer manual for specific numbers. all cylinders need to be over 100 lbs and equal each other within 5 lbs.(2) check spark. use a spark gap tester all cylinders should jump a half inch gap. if you have good compression and good spark, fuel is the problem nine times out of ten. Drain gas tank,clean fuel lines replace primer bulb and replace all fuel filters. Finally replace spark plugs, I know spark plugs probably don't look bad but this is a outboard. Fresh spark plugs means less resistance for the ignition system. The ignition system is week compared to automotive. Test drive boat, if the problem is still there then there is further steps to take. Again I don't know the year model so I guessing its fuel injected. Pull out your clymer manual. what is great about the Clymer Manual for Novice techs is it gives detailed info on your outboard. Troubleshooting tips and teaches you how your outboard works.

Sep 08, 2009 | Light Outboard Motor Boat Bass Fishing...

2 Answers

Do i have to mix 2 stroke oil on the gas for the 4 stroke bikes or just add regular gas on the tank? if is what is the scale for the mix?


DO NOT mix oil in the gas on your four stroke engine. You will foul the spark plug(s), build up deposits on the valves and head, and make a smokey, smelly mess. A two stroke engine uses the fuel/oil mix to lubricate the engine before being used as fuel. A four stroke engine has a separate lubrication system and does not normally burn any oil. As the name implies, a two stroke engine works in two strokes. The first stroke is downward, where the fuel/oil mix and air are drawn into the cylinder. The momentum from the crankshaft counterbalance or force from the other cylinder(s) drive the piston back up compressing the mix, and the spark plug sparks at or slightly before the top of the stroke. The rapid combustion of the fuel/oil/air mix drives the piston down, which is the power stroke, and then the cycle starts all over again. A four stroke engine has an intake stroke down taking in the fuel/air mix, a compression stroke up, a power stroke down as the fuel/air mix is ignited at or before the top of the stroke, and a exhaust stroke up before starting all over again. A four stroke is much cleaner and more reliable than a two stroke, but it is heavier and has less torque. A two stroke engine is much lighter and has more torque, but takes more maintenance.

Feb 28, 2009 | 2003 Yamaha YZ 250 F

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