15 HP Evinrude 93' won't restart after running

[ninja85]

Motor starts great when it is cold, but after you take it out and run it for awhile. After you kill it you can not start it back up. I have took off carb. and clean really well, also looked at fuel pump and rubber still seems good and soft with no holes. Does seem to me that the fuel bulb will not really get as hard when it is hot, like it will when it is cold. Have not checked for spark when it wont start. I'm thinking it is something to do with the coil when it heats up. If anyone can help me it would be great.

 

[jriegle04]

Re: 15 HP Evinrude 93' won't restart after running

i would start by checking spark once it has warmed up. if there is any cracking evident in the coils they have a good chance of being bad. i would buy a carb kit as well just to have peace of mind that the carb has a new needle / seat and gaskets. i would also check the choke. it sounds like it might be a flooding problem as well. are the plugs wet after this happens? what condition are they in after a run?

 

[ninja85]

Re: 15 HP Evinrude 93' won't restart after running

the kill switch is broke, I have to flood it to kill it could that be the problem, but when I have the muffs hooked-up all works great I can restart it as many times as I wont by using the choke to kill it. I can pull it out of the water bring it home and it will always start no problem it is really got me stumped. It is somthing to do with it getting hot. Even if I go out and kill it for 2 hrs it still wont start. It is a bucket motor (only runs good when muffs are hooked up.

 

[ninja85]

Re: 15 HP Evinrude 93' won't restart after running

coil has a few little cracks in soft material, but over all looks OK. I am going to take out today and see if I run it compeltey out of gas to kill it instead of flooding it to see if it will restart.

 

[jriegle04]

Re: 15 HP Evinrude 93' won't restart after running

make sure you take a look at your spark plugs after your run. it will tell you alot about what is happening inside the engine.

 

[ninja85]

Re: 15 HP Evinrude 93' won't restart after running

Good spark when it wont start and replaced the kill switch so I dont have to flood it to kill it. But it still will not restart when it has warmed-up. Get this when I pulled it barely out of the water at the ramp it fired right up. I think it has something to do with the back prssure of the water on the motor. I hope someone out there has seen this problem before. PLEASE HELP ME!!!!!

 

[jriegle04]

Re: 15 HP Evinrude 93' won't restart after running

where is the waterline on the motor when it is in the water? what is your compression?

 

[wilde1j]

Re: 15 HP Evinrude 93' won't restart after running

Have you tried a needle gap spark tester when the motor is fully warmed up? Spark should jump a 7/16" gap. Sometimes coils will work OK when cold, but have an internal break that opens up when warm. In fact, a better test would be to heat the coil with a hair drier and immediately test.

 

[Rick.]

Re: 15 HP Evinrude 93' won't restart after running

Your symptoms are strange to say the least. It does sound like a back pressure issue the way you describe it. Coils getting hot make no sense if it will run on muffs and at the dock. Have you got recent compression numbers? It would be interesting to know what they are. You might want to pull the exhaust plates and see if the passage is badly gummed up. To do that you have to pull the power head though. I would also suggest turning you slow speed idle a little richer but I have to admit I'm guessing here. This is a good problem in that we can all learn from it. Sucks to be you though as your the one with the problem. At first I was thinking power pack but the power pack doesn't know if your in the water, in a barrel or using muffs so I would guess it is fine. Best of luck. Rick.

 

[ninja85]

Re: 15 HP Evinrude 93' won't restart after running

Thanks for all the help but I dont think it is something that I can fix. I think it might have something to do with the compression. That is what has been going thourgh my mind so when I heard someone else say it I got worried. I do not have a compression meter, but a mechanic buddy of mine said that when a piston get hot the chamber expands, maybe losing a good seal. I am thiinking that maybe that is the problem not enough power to push the back pressure away on crank up. I GIVE UP!!!!!!! I put it in the shop thursday. what is the price range on a rebuild job, and do you all think that it is worth it or not.

 

[Rick.]

Re: 15 HP Evinrude 93' won't restart after running

Quitter. Just kidding. I know you tried. Let hope they find something rather quickly. Shop rated hear are $125/Hr. and a minimum one hour. At that rate a rebuild is out of the question. Make sure to ask the shop to check your compression but post the numbers hear for advice. Hope it works out for you. They are great motors. Rick.

 

[ninja85]

Re: 15 HP Evinrude 93' won't restart after running

Guy called about the boat today, he said he pulled the carb, and put a new the new kit in it. and put a new kit in the fuel pump. He said to me the other day that he was sure that would fix it. WRONG!!!!!!!! He check compression and he only was getting 80#. So he pulled it apart and he said that the piston head looks like something got in the motor (like a bolt or nut), and bet the top of the piston up a little. SO GUESS WHAT!!!!! REBUILD. It is always something. I also took my 4 wheeler out yesterday and the breather hose of the rear differentail is pouring out fulid. I guess the saying when it rains it pours is ture. I will keep you all updated (PS: rebuild is costing me 450 parts and all). I guess that's a good deal. Let me know if that is a good price

 

[ninja85]

Re: 15 HP Evinrude 93' won't restart after running

I heard from the guy fixin my boat. He said that he is just going to compeletly rebuild the motor (new everything). Rebuilt carb, fuel pump and two new pistons with new rings and seals. He said it would be like a new motor but the price went up a little becuase he was going to salvage the pistons, but I told him to go ahead and replace both of them. The total on parts is around 300 and the labor is going to be 350. I think that is a really good deal. He said that I will have to break it in like a new motor. If you guys can tell the best way to break it in that would be thanked.