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Having problems with 74 15 hp motor. Starts great, smokes and seems to have a miss. Pull #1 plug wire and engine smooths out. Pulled access panel and notice #1 piston had small gouge. Is this a rings problem or a coil problem? Looking for answers. Cant find them on the internet.
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I would run a compression test on it first and see what kind of readings you get. When you say that it smooths out with one pulled I think of spark jumping between the two wires firing partly on both. Maybe the points are way off? -
15 Hp is only 2 cylinder right? When you pull #1 and say it smoothes out, I would think it is smoother because it is only running on one cylinder and you have basically eliminated what ever problem is present on #1 causing it to "mis"
I would check compression like suggested by high country, if it checks out (with in 10-15% of each other) then start checking your spark
Let us know what you find :-)Comment
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checked compression and both are the same. thinking it may be the plug wire coil. when I said it smoothed out, what I ment was it stopped cutting out and ran continous without cutting.Comment
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