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my rev counter is playing funny beggers, the rev counter seems to jump up in steps and occasionally goes off the scale, but the engine seems to run fine, any ideas?
I had this and it drove me nuts for ages. I eventually found it was just a poor connection on the multiplugs. There are 3 multiplugs at the rear of the engine. Clean these up as they get dirty inside. I cut the plugs out completely and just soldered the wires together - cured mine.