Problem with evinrude 140

[t180man2]

The starter would not turn the flywheel when I tried to start the motor. I dropped the lower unit and removed the plugs and I can do full revolutions by hand but it is very tight. I removed the heads and there is no scarring and all the pistons go up and down good. How easy should the flywheel be to turn? The walls were well lubricated good. Any help will be greatly welcomed.

Thanks in advance!

 

[Dennisanoka]

Re: Problem with evinrude 140

I have a 90 and even without dropping the lower unit I can turn it over by hand without the plugs in it. Mine is tight but thats because of the water impeller resistance. If there's not scoring on the cylinders all I can think of are the upper and lower main bearings or a connecting rod bearing,either on the crank shaft end or the piston end. Before you go further though see what some other more experienced people have to say here.

 

[Seasport]

Re: Problem with evinrude 140

The question is - is it any tighter than it was before? You should be able to turn it over by hand using the flywheel but it will still be reasonably tight, i.e. you wont be able to spin it over with one hand say.

I'd be inclined to check out your starter before you go too far with dismantling the motor. A poor starter or bad wiring will mean that the starter motor will struggle to turn over the motor. Will the starter motor turn over the motor with the plugs out?

You can run a jumper cable directly between the battery +ve and starter terminal and see if this makes a difference to the starter.

The first thing to check is all the connections between the battery +ve to solenoid and solenoid to starter motor. Dismantle them and give them a good clean. A poor connection (or bad cable) will lead to voltage drop and loss of power at the starter. As a hint any poor connection will get quite hot as you try to turn over the starter. Also check the powerhead ground connection back to the battery -ve.

Check that the battery is in good condiiton and fully charged. You can do a lot of tests with a voltmeter if you have one. The first test is to measure the voltage directly at the starter motor (between the +ve terminal and case)when it is trying to turn. You should get at least 9.5V.

I can post some more voltage tests if you want to go down this track.

 

[Dennisanoka]

Re: Problem with evinrude 140

t180man2,

I was under the impression that when you said it was hard to turn over that, that was without the heads on, and the lower unit still dropped. Is that the case?

 

[t180man2]

Re: Problem with evinrude 140

Before I pulled anything the starter would engage and stop. I then drained the lower unit and about 8 to 12oz of milk came out and that was it. I dropped the lower unit and pulled the heads also. I can turn the flywheel all the way but it's pretty stiff. I bought the boat and motor knowing something was wrong but the guy had no idea what it was. The motor was running in the water and stopped on him at idle.

I'm thinking because there was such little oil (and it was mostly water) that the problem is the lower unit But I'm not sure.

 

[Dennisanoka]

Re: Problem with evinrude 140

Well anything looking like milk running out of the lower wasn't good, but you knew that so there is a problem there of some sort but you want to know if the power head is ok. Did you try turning it over after you dropped the lower unit but before you pulled the heads?

 

[t180man2]

Re: Problem with evinrude 140

Well anything looking like milk running out of the lower wasn't good, but you knew that so there is a problem there of some sort but you want to know if the power head is ok. Did you try turning it over after you dropped the lower unit but before you pulled the heads?

Yeah, but not much of a difference. Ther is no noise or any kind of grind.

 

[kenmyfam]

Re: Problem with evinrude 140

Well something must be binding it up. Keep tearing down till you find it is the only sure way.

 

[Dennisanoka]

Re: Problem with evinrude 140

So will the starter turn the engine over now with the heads off? If not, either the starter is bad or when you say stiff you mean really stiff. It's not going to be free so to speak, there's still going to be resistance to moving the fly wheel but obvoiusly if the starter is good it would be cabable of turning it over. I wouldn't pull the engine apart quite yet. BTW, I hope you got a real deal on this rig. If you paid what the boat and trailer were worth you may be alright.