I have an 1977 Clark Michigan 55B that has the V378 engine. Since about end of summer it's been hydrolocking on random cylinders every so often. Sometimes it spins right up, other times it don't. I roll it past the filled cylinder slowly with a bar and then she fires right up and runs fine. It's done it on almost every cylinder randomly. It's fuel not coolant, the oil level has came up now over the HI mark so I'll be draining and changing soon, only use it for plowing snow this time of year. Shut off solenoid seems fine, it starts and shuts off normally. Anyone have an idea on what's causing my V378 to fuel hydrolock on random cylinders after sitting a week or 2?
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