94 Evinrude 115 runs bad until it sits for an hour then runs great. Help

[Starrgazer]

I have a 94 115 Evinrude that was running fine until I cleaned the carbs with a can of CRC outboard cleaner. This can had a hose that screwed right onto the primer. Why did I clean the carbs if it ran fine? Because I always have to give it half throttle in nuetral and use the primer to get it to start even after it is warm. Any way I told that story to tell this one. After the cleaning I changed the fuel filter, check the plug wires and installed new champion marine plugs. Now right of the trailer it starts fine (still have to use half throttle with primer but it starts) but only hits on 3 of the 4 cylinders. I can run it around and it will plane out slowly but won't hit on the 4th cylinder. I have checked to ensure all the plug wires are on and they are. The day was hot so I anchored and jumped in. After about an hour I got back in to take it home. The motor started right up and the engine ran great and all throttle ranges. I stopped and waited for 10 minutes and started again. Engines runs great. So I put it back on the trailer and went home happy. The next weekend the same exact same thing happened as the weekend before. I have looked at alot of threads and couldn't find this one. Can anyone help?

 

[tashasdaddy]

Re: 94 Evinrude 115 runs bad until it sits for an hour then runs great. Help

you did not clean the carbs, you did a decarb, totally different. the primer squirts directly into the intake manifold. bypassing the carbs.

it sounds like you have a case of ethanol poisioning. proper disassembly of carbs, cleaning, kits new fuel lines. read this. http://forums.iboats.com/showthread.php?t=299680

 

[Starrgazer]

Re: 94 Evinrude 115 runs bad until it sits for an hour then runs great. Help

Ok, I will look into that. I have a manual ordered to help.

 

[countvlad]

Re: 94 Evinrude 115 runs bad until it sits for an hour then runs great. Help

you did not clean the carbs, you did a decarb, totally different. the primer squirts directly into the intake manifold. bypassing the carbs.

it sounds like you have a case of ethanol poisioning. proper disassembly of carbs, cleaning, kits new fuel lines. read this. http://forums.iboats.com/showthread.php?t=299680

i had the same impression until last time i rebuild my carbs and looked for the fuel hose coming of the primer solenoid... there are actually two hoses... one 1/4" and i think the other is about 1/8"

the 1/4" goes into the fuel maniforld and the 1/8" bypasses the carbs....

i think, when you start the motor and actuate the primer solenoid from the key it dumps fuel past the carbs...


but when you use the shreder valve and the red knob in manual it dumps everything in the fuel manifold.....

 

[Starrgazer]

Re: 94 Evinrude 115 runs bad until it sits for an hour then runs great. Help

Thanks for the reply and the links. Good information.