No spark on bottom cyl.

[Dreworr123]

Hello, I have a 1963 35hp merc. I tested the plug wires with a test light and noticed the bottom wire had no spark. Where do I go from here? Check the points on the magnito? I have had the engine running a few times and have heard the lower cyl. kick in once or twice but at WOT the boat barely moves. Any help would be greatly appreciated.

 

[Maxz695]

Re: No spark on bottom cyl.

test the switchbox by the manuel specs

 

[Dreworr123]

Re: No spark on bottom cyl.

I didnt think this system had a switchbox? Where should I be looking?

 

[Faztbullet]

Re: No spark on bottom cyl.

Remove the flywheel and check/clean the points, test the condensers, and ohm the sparkplug wire/s, check plugwire connection into coil. Make sure you have the correct sparkplugs (J4J) and set gap at .020 on points...

 

[Dreworr123]

Re: No spark on bottom cyl.

Awesome! Thank you! Quick question while I have the flywheel off. Is there a way to connect a tach wire onto this system?

 

[merc850]

Re: No spark on bottom cyl.

That model doesn't have CDI igniton it uses a magneto so the only way to add a tach is to the alternator yellow lead if engine is an electric model. Should have a decal on lower cowling that says MercElectric.

 

[Dreworr123]

Re: No spark on bottom cyl.

No alternator on this model. Is it possible to add something to this magneto system?