Quit on the Water!

[LaqueRatt]

Well my fun day was a short one. Recently got done working on my 65 Fastwin and it seemed to be running great. Started on one pull, idled nice, accelerated smoothly. First time with a new motor I was going pretty slowly trying to stay on the end of the lake were the ramp is. After about 10 mins of low RPM running she quit and wouldn't restart. Changed the plugs, still dead.

So I go out and try to start it today and she fires right up on one pull. Any ideas? Could running at low RPMS cause it to overheat? It's pushing water for sure, but maybe not enough? Impeller issue?

 

[Dave1027]

Did you check the fuel supply? Was the vent open on the fuel tank? Did you check the primer bulb?

 

[LaqueRatt]

That all seemed OK. Have clear lines, could see gas in them. Even if fuel pump dies it should run if you pump bulb, right? The fuel line looks new, but seems soft to me. Shouldn't fuel line have lettering on it? I'm thinking maybe when it gets hot under the cover the soft line gets even softer and collapses? Going to replace that crap tomorrow. Just doesn't seem right.

 

[LaqueRatt]

What about coils? When I pulled the plugs one looked a bit sooty, but the other looked fine. So I'm thinking the issue must be mainly with one cylinder. Can the coil work when cold and then quit when warmed up I wonder? How would I test for something like this?

 

[clemsonfor]

What about coils? When I pulled the plugs one looked a bit sooty, but the other looked fine. So I'm thinking the issue must be mainly with one cylinder. Can the coil work when cold and then quit when warmed up I wonder? How would I test for something like this?

Yes that's how electronic parts fail. When they heat up they will no longer work but then work when cooled. Are you sure you had fuel in your carb? Stuck needle?

 

[LaqueRatt]

I just cleaned the carb and it was running real nice right up until it wasn't running at all. Got it back on the stand, going to pull the flywheel and have a look. Guess it's time to give the McCulloch 14 some lake time! Just got it going a couple weeks ago so this is a good excuse to test it out.

 

[Chris1956]

That motor would have twin magnetos, right?

Inspect them and look for cracks in the coils. If you find those, replace the magnetos. If no cracks, ign system should be good.

 

[LaqueRatt]

At the risk of sounding stupid, could you please tell me which parts are the magnetos? I don't see them in the parts list: https://www.marineengine.com/parts/...=10524C&manufacturer=Evinrude&section=Magneto

 

[Johnson110]

On the parts list they the magnetos are listed as coils that is ignition coils, there are two on the motor you have under the flywheel.

 

[LaqueRatt]

OK cool. Thanks. So I got the flywheel off and everything looks OK to me, but what do I know? I'll post some pics up in a bit to see what you guys think.

 

[saltchuckmatt]

OK cool. Thanks. So I got the flywheel off and everything looks OK to me, but what do I know? I'll post some pics up in a bit to see what you guys think.

Should be called pickup coils. Obviously you can't tell by looking. You will have to perform tests.

 

[jimmbo]

At the risk of sounding stupid, could you please tell me which parts are the magnetos? I don't see them in the parts list: https://www.marineengine.com/parts/...=10524C&manufacturer=Evinrude&section=Magneto

If the engine is a 1965 Fastwin, that is not what the Ignition system consists of
Here is yours

 

[LaqueRatt]

When said it looked OK, I meant nothing seemed obviously amiss. Pretty sure I can test the coils, I have an ohm meter. How will that tell me though if they wonk out when they get warm? Heat them up somehow while measuring resistance?

Do these coils look original? I really expected them to look a lot worse. I'm almost thinking they look new maybe. There's a logo with an M on them and I see the same logo on the points and elsewhere. What would M stand for though?

 

[jimmbo]

The 'M" is an OMC Trademark. The coils may have already been replaced, doesn't mean they haven failed. But now you have access and can meter them for Shorts/Opens, as well as inspect the Points.
Coils that fail when Hot, aren't all that healthy when cold either. But heat them up with a Hair Dryer, to be sure. The Capacitor/Condenser can also go wonky when heated.

 

[saltchuckmatt]

I think I would put it back together and do a spark JUMP test. Not spark, but determine that you have a good spark. Pretty sure others will say "your had a 3/8 jump. Then run it until you have the condition again (no running) and then check for GOOD spark. If you have good spark then you can rule that out and go on to the next thing. In my book, be thorough, eliminate and then go on to the next. Guessing is usually not the answer.

 

[LaqueRatt]

Thanks Jimmbo, that's quite helpful. Happen to know how many ohms they should read?

 

[LaqueRatt]

Bought a spark tester a couple weeks ago and checked this motor with it. Jumped about 3/16" and looked healthy. Bright anyway. Thought about checking for spark when it quits too, but that might be hard to do out on the lake on a sunny day. Think I'll try the hairdryer trick. Should work for checking spark too.

 

[saltchuckmatt]

Bought a spark tester a couple weeks ago and checked this motor with it. Jumped about 3/16" and looked healthy. Bright anyway. Thought about checking for spark when it quits too, but that might be hard to do out on the lake on a sunny day. Think I'll try the hairdryer trick. Should work for checking spark too.

Is your spark tester adjustable? 3/16 and 3/8 are quite a bit different. Never tried the hairdryer but you will need to heat more than just the pick up coils. Ignition coils might be doing it to.... Have you ever been able to make the condition at home? Or is only out when your under load and running wide open?

 

[jimmbo]

On a Magneto the Spark isn't as strong as with the newer breakerless ignitions. If the spark can jump a 1/4", better yet 5/16", it is doing a good job

 

[racerone]

This motor has 2 ignition coils under the flywheel.-----No pick-up coils as far as I know.