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Have you checked engine compression or spark output?
Hello. the oil injection won't cause to much of an issue. Let me know what you get for compression numbers and we can go from there.
Got it. The correct way to check for spark output would be to hook up a timing light to each plug wire one at a time, and see if the light flashes or not. This has to be done with the boat in the water. Is this how the mechanic checked spark, or did he do it some other way?
Okay let me know how you make out