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Evinrude problem

Old 05-29-2016, 07:13 AM
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Default Evinrude problem

My 1993 evinrude ocean runner 225 seems like it's backfiring every 15 seconds or so at idle. We checked compression and the bottom left cyl was about 20 psi lower than the others. We replaced the head gaskets and now they are all back to 115 psi. Started it up and it still puffs and sputters every 15 seconds. We decided to rebuild the carbs and after rebuild they leak a little bit of gas when the primer bulb is pumped, not sure if that could contribute. Pretty much at a dead end as far as finding the problem.
Old 05-29-2016, 07:19 AM
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The sneezing is a sign of lean condition. Are the carbs leaking at the gaskets and bowls or at the throats ?
Old 05-29-2016, 08:06 AM
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They are leaking at the gaskets. How should I seal it? The gaskets were just replaced.
Old 05-29-2016, 09:38 AM
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Are they leaking at the bowl gaskets? Do you have plastic bowls? They could be warped if so and new plastic bowls will be in order.
Old 05-29-2016, 05:04 PM
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Originally Posted by Dacman View Post
Are they leaking at the bowl gaskets? Do you have plastic bowls? They could be warped if so and new plastic bowls will be in order.
That all sounds correct
Old 05-29-2016, 05:33 PM
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could be a v.r.o pump
Old 05-29-2016, 07:36 PM
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Originally Posted by Anchor_Management View Post
That all sounds correct
Hi sir! Mr. Mitchell Master, Mr. Dacman and Mr. Seahorse are very good with these motors. Listen to them I like your forum name and picture We have the manual if you want to ask more questions.

Thanks,

Caleb

Last edited by calebollie; 05-29-2016 at 07:55 PM.
Old 05-29-2016, 07:45 PM
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Bad reed?
Old 05-29-2016, 08:26 PM
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Originally Posted by calebollie View Post
Hi sir! Mr. Mitchell Master, Mr. Dacman and Mr. Seahorse are very good with these motors. Listen to them I like your forum name and picture We have the manual if you want to ask more questions.

Thanks,

Caleb
Thanks! I have a manual also but thanks for the offer.

Checked the plastic bowls and they are warped and will need replaced. Glad we caught it before going out on the water, would not be safe to have all that gas leaking in the cowling with all the vapors, not to mention the environmental impact of leaking into the water. Or possible engine damage due to lean condition and gas mialage reduction. Crossing my fingers that nothing else is wrong.
Old 05-29-2016, 09:01 PM
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Some common causes of lean backfiring:

Thermostats not warming up both heads to about 140°
Throttle plates not sync'd or fully closed
Carb idle fuel passages restricted - put round toothpick in idle air bleed jet on front of carb. That will richen up the idle circuit. If the backfiring goes away, you found the bad cylinder, carb, or gaskets that caused it to backfire.
Stuck piston rings, run 2 cans of Evinrude Engine Tuner through the motor -- 2 decarbonizing procedures
Blown or leaking reed box gasket
Stuck open bleeder valves - check valves
Some type of air leak into a crankcase causing a lean condition
Old 05-29-2016, 09:06 PM
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Originally Posted by wellcraft1 View Post
could be a v.r.o pump
Just explain to me exactly how you came to this conclusion?
Old 05-29-2016, 09:43 PM
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Originally Posted by seahorse View Post
Some common causes of lean backfiring:

Thermostats not warming up both heads to about 140°
Throttle plates not sync'd or fully closed
Carb idle fuel passages restricted - put round toothpick in idle air bleed jet on front of carb. That will richen up the idle circuit. If the backfiring goes away, you found the bad cylinder, carb, or gaskets that caused it to backfire.
Stuck piston rings, run 2 cans of Evinrude Engine Tuner through the motor -- 2 decarbonizing procedures
Blown or leaking reed box gasket
Stuck open bleeder valves - check valves
Some type of air leak into a crankcase causing a lean condition
Do you prefer the 2+4 tuner over pre mix seafoam?

Certainly easier.
Old 05-30-2016, 03:28 AM
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Originally Posted by noelm View Post
Just explain to me exactly how you came to this conclusion?


http://www.thehulltruth.com/attachme...1&d=1464604067
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Old 05-30-2016, 05:15 AM
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Originally Posted by gofastsandman View Post
Do you prefer the 2+4 tuner over pre mix seafoam?

Certainly easier.
Use Evinrude Engine Tuner because 2+4 is a fuel stabilizer additive

SeaFoam is a strong solvent and Engine Tuner contains a lubricant for the cylinder walls and bearings. SeaFoam washes away any engine oil
Old 05-30-2016, 05:52 AM
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Originally Posted by calebollie View Post
Hi sir! Mr. Mitchell Master, Mr. Dacman and Mr. Seahorse are very good with these motors. Listen to them I like your forum name and picture We have the manual if you want to ask more questions.

Thanks,

Caleb
'
What you talkin 'bout ?
Old 05-30-2016, 08:42 AM
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Originally Posted by seahorse View Post
Use Evinrude Engine Tuner because 2+4 is a fuel stabilizer additive

SeaFoam is a strong solvent and Engine Tuner contains a lubricant for the cylinder walls and bearings. SeaFoam washes away any engine oil
I didn't word my question well once again...
I was talking about dunks method vs the can and Schrader valve tuner not 2+4

Now you are adding oil to the seafoam and gas.

Does tuner have no solvents?

Thanks for your thoughts.

Last edited by gofastsandman; 05-30-2016 at 03:48 PM.
Old 05-30-2016, 12:54 PM
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Originally Posted by calebollie View Post
Hi sir! Mr. Mitchell Master, Mr. Dacman and Mr. Seahorse are very good with these motors. Listen to them I like your forum name and picture We have the manual if you want to ask more questions.

Thanks,

Caleb
Originally Posted by mitchell master View Post
'
What you talkin 'bout ?
He is a younger gentleman. He and his father have been successfully troubleshooting issues with the same motor(1996 Evinrude 225).

He was being respectful and giving you a compliment by saying you really know your stuff with regards to OMC and two stroke motors.

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