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1982 35 Evinrude will not restart when it has run for a while

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sbennett63

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I own a 1982 35 Evinrude. It will run full throttle perfectly but idles rough, I have been through the carb completely. After the motor runs a while and is at operating temp it will not restart until it cools off for about 10-15 minutes, no fire. I am leaning towards a new Power pack. The engine has 150 pressure in both cylinders and has never had any work done except a Carb rebuild and a water pump, very low hours. Any advice would be appreciated. :confused:
 
It may be overheating, the tell tail peeing out water does not mean the cylionders are getting water. Are you sure the water passages are clean in the heads? I've bought 8 engines down here in Florida and 6 of them were totally clogged.
 
Klink said:
It may be overheating, the tell tail peeing out water does not mean the cylionders are getting water. Are you sure the water passages are clean in the heads? I've bought 8 engines down here in Florida and 6 of them were totally clogged.
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Thanks for the advice, I will clean them out and see.
 
The removal of the cylinder heads only variable is stuck bolts, if you don't get any, the job is easy. If you do get them the job can be a hassle. I've found that the best way to remove bolts is to try with a 3/8" socket wrench and don't apply so much pressure that you break the bolts. If they don't budge, then hit them with a nice sized punch to turn them in the unscrew direction. Then try the socket wrench again, again don't put so much pressure that you break the bolt. If it does not go, punch it again.

Good luck. If they are really bad, I find that praying always helps to. No joke.
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Klink said:
The removal of the cylinder heads only variable is stuck bolts, if you don't get any, the job is easy. If you do get them the job can be a hassle. I've found that the best way to remove bolts is to try with a 3/8" socket wrench and don't apply so much pressure that you break the bolts. If they don't budge, then hit them with a nice sized punch to turn them in the unscrew direction. Then try the socket wrench again, again don't put so much pressure that you break the bolt. If it does not go, punch it again.

Good luck. If they are really bad, I find that praying always helps to. No joke.
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Thanks, It appears the bolts have never been removed so I hope they are no stuck. I believe in Prayer myself!!Do you know if this engine has a device to shut down the firing when it gets too hot? I know it has a alarm in the control box.
 
re: Do you know if this engine has a device to shut down the firing when it gets too hot? I know it has a alarm in the control box.

No I do not know if it has a shut down device. I doubt if it does.

My 1993 Johnson 25hp has a slow speed device that slows engine to max 2500 rpms when it sets off the overheat. Does your sound alarm in the console work?

On my J 115 hp the alarm did not go off, and it was working, when my engine did just like yours. The 115 has 4 cylinders, 2 heads, and I had done cleaned out the water passages on the hot side (starboard) head and changed the thermostats. When I took it out for a test, it ran fine till I tested her at wide open and when I slowed down to idle, she shut off and would not start. So I left her alone for a while till she started again and I went home. The next day I removed the port head and it too was clogged though not as bad. You see, the alarm did not go off, and the telltale worked fine. My water temperature sender for the gage on my instrument panel, the device that would have warned me of a problem coming, is connected to starboard head, and the problem was with the port head!

My J25 is on a small boat with no instrument panel, no sound alarm, so I only have the tell tail and the high temperature rpm reducing device which comes with the engine. I'd rather have a water pressure gage and a water temperature gage, but having cleaned out the head, I know what I have, so no need to complicate things. I'd rather be boating than working on the boat.
 
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Sounds more like an ignition problem. Check your spark when it quits with a spark tester set at 7/16" open air gap.
 
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