Trapper Martin Posted July 21, 2017 Report Share Posted July 21, 2017 My '88 Evinrude 3 cylinder run ok when its cold but run it 10 -15 min and she wont idle and dies when you get on to go, need ether to get off the lake......coils ever a problem?? Link to comment Share on other sites More sharing options...
west tide Posted July 22, 2017 Report Share Posted July 22, 2017 Have you replaced the thermostat?? Sounds like an overheat issue Link to comment Share on other sites More sharing options...
Trapper Martin Posted July 23, 2017 Author Report Share Posted July 23, 2017 Thermostat went out yrs ago out on the bay, shop told us we can get by without, never got another put on.....it only started acting up like this this week... Link to comment Share on other sites More sharing options...
west tide Posted July 24, 2017 Report Share Posted July 24, 2017 How about the water pump impeller?? Link to comment Share on other sites More sharing options...
Trapper Martin Posted July 25, 2017 Author Report Share Posted July 25, 2017 Didn't check that but have a very good 'pee' stream, good circulation......just checked compression today...38-32-38...sounds very low to me...need rings maybe? Link to comment Share on other sites More sharing options...
west tide Posted July 26, 2017 Report Share Posted July 26, 2017 Maybe so. I know that a product called "ring free" can help but I'm not sure with compression that low. It worked on my engine years ago when one of the six cylinders was 30 lbs lower than the rest. If the cylinder isn't scored then new rings should be the ticket! Link to comment Share on other sites More sharing options...
ccb Posted July 26, 2017 Report Share Posted July 26, 2017 I have a older 140 and when it gets hot , it was cutting out. I run some seafoam throughout it in a six gal. tank It runs a better now. They say they get carboned up and by running it with the seafoam it cleans it up . You could try it? It can't harm it, they say? It cleans the carbon out . You can read about it on the web and other sites. Link to comment Share on other sites More sharing options...
Stonesipher Posted August 10, 2017 Report Share Posted August 10, 2017 On 7/25/2017 at 5:51 PM, Trapper Martin said: Didn't check that but have a very good 'pee' stream, good circulation......just checked compression today...38-32-38...sounds very low to me...need rings maybe? VERY LOW !!! You’re not some crazy uncle you know! I'm so glad I don't live in the fact-less bizarro world you live in...just sayin'. Link to comment Share on other sites More sharing options...
makorider Posted August 13, 2017 Report Share Posted August 13, 2017 I think you'd be hard pressed to get all three jugs to bomb out like that...something is up with your guage, your process....or your oil injection lol Link to comment Share on other sites More sharing options...
BrianBM Posted August 14, 2017 Report Share Posted August 14, 2017 Would a 3-cylinder that old be a 2-stroke or a 4-stroke engine? Link to comment Share on other sites More sharing options...
Trapper Martin Posted August 17, 2017 Author Report Share Posted August 17, 2017 (edited) Its a 2 stroke, ...did a dummy movr replaced the head gasket without planeing the head, immediately blew the new gasket but wasnt leaking on the outside so i didnt realize it,messed around a long time did seafoam & things,finally pulled the head to check rings & bingo bad gasket!! ....planed head and it ran pretty well on the small pond i was on...headed for bigger water & missed a curve on a gravel ran my whole rig through a 10' road ditch into a bean field, boat came off the trailer,boat will be ok but trailer axle ruined.....my boat finally runs but now i xant make it to the water!!! Edited August 17, 2017 by Trapper Martin Link to comment Share on other sites More sharing options...
BrianBM Posted August 20, 2017 Report Share Posted August 20, 2017 I do wonder about not needing a thermostat. You trust your engine guy? Link to comment Share on other sites More sharing options...
Mr T Posted August 23, 2017 Report Share Posted August 23, 2017 Good to hear the compression issue is figured out- I agree about the thermostat, you need to put it back in. mfrs don't put parts on if they aren't needed. Link to comment Share on other sites More sharing options...
Daveyj74 Posted October 27, 2017 Report Share Posted October 27, 2017 Try Sea Foam. I had the same problem and ran a whole can mixed with a gallon of gas thru the motor. It smoked like hell at first but after it cleared up the motor ran great. Link to comment Share on other sites More sharing options...
OnTheFish Posted November 8, 2017 Report Share Posted November 8, 2017 The reason they have a thermostat is for two reasons first to keep the engine at a consistant temperature second to create a restriction in the cooling system so the water can absorb the heat and cool the engine with out the water flows through too fast and can’t cool properly like said above the manufacture wouldn’t put it on there if not needed probley not causing your running issue but should be fixed Link to comment Share on other sites More sharing options...
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