1985 70 HP Evinrude starting problems

[Walid1]

I was out in the boat yesterday and noticed the engine laboring and not able to go full throttle even though the lever was in full throttle
I suddenly heard a snap from the motor and all quit
I was unable to start the engine and had to be towed back
At home I was unable to turn the flywheel by hand, removed all the plugs and still no success
I was able to turn the flywheel with a wrench on the nut, but it was tight
When I put the gear lever in reverse or forward, the prop would turn, in neutral it would not turn as it is supposed to
I recharged the battery and even though the starter engaged the flywheel, it was unable to turn it

Pls Help

 

[patrick4266]

Re: 1985 70 HP Evinrude starting problems

Sounds like you blew your motor up.

 

[Walid1]

Re: 1985 70 HP Evinrude starting problems

Sounds like you blew your motor up.

for interest, When turning the flywheel manually, I can see the pistons moving up & down through the spark plug holes

 

[Daviet]

Re: 1985 70 HP Evinrude starting problems

You should be able to turn that engine over with your hands with the plugs out. You have a problem in one of two areas, lower unit or power head. You could try dropping the lower unit and see if the powerhead turns over properly, if so you have a lower unit problem. If it still turns over hard pull the cylinder head and see what's going on.

 

[Walid1]

Re: 1985 70 HP Evinrude starting problems

thank you

When I removed the lower screw to remove the gear oil, screw & oil shot out the unit about 3 -4 ft
Will draining, I noticed a metal piece about a 1/4" long fall out as well as metal filings
I removed the plugs again and turned over the motor quickly,
It turned freely and effortlessly

Should I now remove the lower unit and how big a job is it
I am quite mechanically inclined