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No oil pressure


Well-Known Member
Sep 15, 2006
Reaction score
J3 started right up, after about 30 days of no flying, and no oil pressure showed. Mechanic disconnected hose from engine block to tube through the firewall to pressure gage, attached his known good test gage and still no oil pressure.
Shop that rebuilt the engine about 75 hours ago said these 65 HP engines sometimes loose the prime in the oil pump, and that the solution is to make up a funnel with fitting to match the hose to the block, and run a quart of oil in through the fitting in the block for the oil pressure gage hose.
Does this sound reasonable, and a fairly common problem?
Chuck Shaw

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