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My father has a 1995 40HP Merc with oil injection. He would rather just mix the oil manually. What does he need to do in order to disconnect the oil pump?
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I bought a kit from mercury to do just that with my 150hp they probably have one for your engine too. The kit replaces the gear that drives the oil pump with a plastic piece.
Disconnect all related to the oil pump including the link to the carburettor, oil module, oil sensor and plastic tank. In my case there was a vacuum line to take the oil from the boat 2 gallon oil tank to the engine tank. In some engines you may have to jump some electrical connection but I don’t remember having to do that.
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