1962 evinrude 18 hp trouble

headhunter130

Recruit
Joined
Apr 20, 2009
Messages
4
I will be as short as possible and see what anyone has a clue as to my problem. My fuel pump was out and the carb kit needed replacing. I had the kit replaced and a fuel pump put on. Motor ran great for about 3 trips. Then wanted to miss on occasion on top end. The next trip it would run but not well, actually horrible. Took it back to the guy who did the work. I had a leak at a fuel line fitting. Replaced fuel line and had to reset the low speed adjustment, running great, for one trip. The next trip on the way in it starts missing again. Took it out again, and it did not want to run, wasn't horrible just didn't sound right. I had a short run to fish, so I got there fished for a couple of hours, and it ran great on the way in. One more trip and did not fish, it just would not run the way it should. Bought a puller pulled the flywheel and one of the points looked dirty, but cleaned up fine. Took it to the lake just to see. Ran great for about 200 yards, slowed up and idled a minute, went back to missing just like before. When I pull the top plug wire, it will keep running with the bottom wire attached, with the top wire attached and bottom wire out, will not run. The coils look fine. The only set of points I have on hand do not seem to be a 100 percent match. When they are installed, there is no way to close the gap, the contact that touches the center shaft is longer than the contact on my old points. I filed one down and got the gap correct and it ran great for about 100 yards and started missing again. I have the sierra 18-5002 kit on the way. Any help will be more than appreciated. The plug wires were replaced a couple of years ago.

Also, I have thought about pulling the carb to see if there is trash in it, but I feel it is electrical. Thanks again for any help.
 

lindy46

Captain
Joined
Nov 27, 2008
Messages
3,886
Re: 1962 evinrude 18 hp trouble

Go ahead and install the new points and condensers. Then check spark. If you're still getting no spark to the top cylinder, then you have a bad coil. Coils can look good, but short out when they heat up.
 

hyspenc

Seaman
Joined
Aug 15, 2008
Messages
73
Re: 1962 evinrude 18 hp trouble

Try a test for continuity with an oms meter check primary and secondary wire
on both coils
then you will know what one is bad.
check both condensiors as well.
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,226
Re: 1962 evinrude 18 hp trouble

I say coil or plug wire. (Hey the new wire could have arced out). It is NOT the carburetor. You are dropping one cylinder. The carb feeds both cylinders.

You could also be getting water ingestion into the cylinders.
 
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