Author Topic: No spark after spraying engine  (Read 793 times)

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Offline rumorhazard

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No spark after spraying engine
« on: March 22, 2018, 09:39:56 PM »
Hello everyone.

I made the mistake of thinking it would be a good idea to paint the engine on my 76 XS500. Never gonna do that again!

Everything ran fine before I started. I pulled the engine, sprayed it, regretted it, put it back in and cursed the chipped paint. Now, the starter motor turns over and the neutral light comes on but no spark is going to the spark plugs. It obviously has something to do with the paint, but I can't figure out where to start.

Any ideas?

Offline rumorhazard

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Re: No spark after spraying engine
« Reply #1 on: March 23, 2018, 03:31:42 AM »
Anyone? I'm otally out of ideas :(

Offline guylr

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Re: No spark after spraying engine
« Reply #2 on: March 23, 2018, 03:49:42 AM »
Possibly not a good ground from the engine to the frame.

Guy
Now Retired Yamaha guy. Cut me and I bleed "Cinquasia Red"

Offline mvluv13

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Re: No spark after spraying engine
« Reply #3 on: March 23, 2018, 08:43:10 PM »
Do what Guy says first to confirm ground, go from neg terminal on battery to a bare metal point or bolt on the motor,where you chippied the paint is ideal. Should be  less than .5 ohms. Once that is confirmed test your ignition circuits. Check for 12V at the points when each set of points is open. Be careful not to leave your coils energized for too long ( get set up for testing and you should only need it on for a minute or so).

Offline rumorhazard

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Re: No spark after spraying engine
« Reply #4 on: April 03, 2018, 08:29:32 PM »
Thank you for the replies everyone. There is currently ground to the engine, the problem is with the points plate! It was a mess in there. I'm making a new post because it might be helpful to other people too