Evinrude 150 Heat Soak

[figmgo68]

I have read the countless postings of people with a similar problem and the countless ways to diagnose & possibily correct the issue. It does not appear anyone has been successful. The problem is my 1997 Evinrude Intruder 150 with new plugs, gas, filters, no VRO2 etc is it will start and run fine until I stop to fish for awhile. Upon starting again it will fire up and idle even on fast idle but will spit and die upon gear engagement. It will eventually move up to plane after a number of retries. The problem is worse when the FL temps climb. I believe it is a heat soak issue. I pulled the engine cover and there does not seem to be any effective way for the heat to escape especially when stopped. I am considering altering the cover with slots to allow heat discharge when stopped. The other treads I have read state the issue goes away if the cover is removed prior to starting to allow the heat to escape. Does this make sense?

 

[DJ]

Re: Evinrude 150 Heat Soak

I've run into that too, here in AZ, temps (outside) can reach 125 degrees.

The issue is the alcohol (oxyginated) fuels. They have low flash points.

The best thing, I've found, is to let the engine idle for a minute, or two, to bring down under cowl temps. For me that means idling up to a fishing spot and only killing the engine after it has had a minute to cool down-at idle.

Also, giving the primer bulb a couple of good squeezes, before start, helps immensly.

 

[tendollar]

Re: Evinrude 150 Heat Soak

got the same thing going on, mechanic told me these motors can be very sensitive to trim angle when starting, said a good place to start troubleshooting this problem is to try different trim angles when starting, little moves. Have not been able to get to the river, something for you to try. I also have heard of the ethanol possibility but I run 100% gasoline 87 and no change.

Tom