Priming new oil pump

[7mm]

Is it necessary to prime a new oil pump in a 1987 2.5L OMC. There is no mention of priming after replacement in the service manual. However priming is all over the web.

 

[Scott Danforth]

did you pre-fill the pump with oil prior to installation?

if so, then no

if not, then yes

did you rebuild the motor? if not, why would you replace the oil pump?

 

[7mm]

I had the engine out of the boat to replace transom. The engine had low oil pressure prior to the work. So I thought it would be a good time to replace it. The engines compression was in spec. So no rebuild.

 

[Scott Danforth]

most likely your bearing tolerance is the issue. changing pump wont fix that.

as long as you had 10 psi per 1000 RPM, you are good on oil pressure.