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Somewhere before I purchased the boat, someone had run the timing back to 18 BTDC. From what you say I should be safe to run it back out to 28 degrees. Thank You.
I roughly verified the TDC is correct. I have a tool coming in next week to measure the TDC. My mistake on the gray wire as I...
Might want to check the TDC physically through the #1 plug hole to confirm the flywheel key is not sheared. There is a tool on Amazon for $10. Or do it roughly with a pencil for a quick check.
I found that one of the silver discs in the carb that I had replaced while cleaning the carbs had dropped out and allowed unresrticted flow of fuel to the idle circuit. I reinstalled the disc (see below) and carbs. Engine started up fine on a cold day with choke and in fast idle at 1200 rpm...
I have a 1990 90 hp Johnson. It was idling rough. Compression is 135 each cylinder. After planning off the engine runs fine to 5000. I cleaned both carbs, and replaced a broken vacuum line under the bottom carb to the intake manifold, and all spark plugs. It idled better but still rough...
