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Gray Marine 109 - Electrical Issue

Old Marine Engine » Gray Marine Gas Engines - 4, 6, and 8 cylinder » Gray Marine 109 - Electrical Issue « Previous Next »

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alan sprag
Posted on Saturday, May 18, 2002 - 01:25 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I have a 1960 Century Ski Dart with a Gray Marine 109 (6 Cyl) gas engine. Engine ran fine last year but won't crank now. I checked a spark plug by pulling from Cylindar and looking for spark and no luck. Then backed to checking for spark from Coil (UC-15); again no luck. Coil had oil in it and I replaced it. ran the spark check again and no luck. The engine turns ovder fine and starter engages fine by turning the belts for crank shaft, etc. The coil has a wire run directly from the key starter that has current runnign when the key is on (wire connected to positive pole on coil). The negative pole on the coil has a wire from the distributor to the coil (also has a positive electical flow when the key is on). I have no idea where to go from here.
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Roger DiRuscio
Posted on Saturday, May 18, 2002 - 01:11 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Lightly file the points then clean them. I bet your spark will be fine.
Roger DiRuscio
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olarry
Posted on Saturday, May 18, 2002 - 06:42 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I agree with roger.If you crank the engine over with the cap off you should see small sparks at the points.If not do the cleaning over.The coil connections are correct for a negative ground system.
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aspragins
Posted on Monday, May 20, 2002 - 10:11 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Thanks guys, tried that and replace a fuse near the ignition, got spark and cranked. I had reversed the firing order but got that cleared up. Great advice for a non-mechanic.

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