1977 140 hp evinrude ready to throw in towel.

[BigB9000]

Re: 1977 140 hp evinrude ready to throw in towel.

I have the EXACT problem

What I have come to guess is a bad timer base.

time base when advances, alows all cylinders to fire corectly. (warm up lever up)


put it down just a hair, it, for whatever reason, stops working and cuts off spark to one of the cylinders.

All for OHMs tests read normal with lever up.
put the lever down, and oms on cylinder 2 3 and 4 are ok, but 1 is at 0

Im about to go take the flywheel off and see what going on inside that timing base plate

 

[shawn_nj]

Re: 1977 140 hp evinrude ready to throw in towel.

I have the EXACT problem

What I have come to guess is a bad timer base.

time base when advances, alows all cylinders to fire corectly. (warm up lever up)


put it down just a hair, it, for whatever reason, stops working and cuts off spark to one of the cylinders.

All for OHMs tests read normal with lever up.
put the lever down, and oms on cylinder 2 3 and 4 are ok, but 1 is at 0

Im about to go take the flywheel off and see what going on inside that timing base plate

Did you ever get a chance to figure it out? I am in the exact same baot as you!

 

[woody66912]

Re: 1977 140 hp evinrude ready to throw in towel.

this sounds like a tough one.looks like everything has been covered?except for maybe the exhaust might be plugged with carbon build up under the power head???.