1980 50hp merc bleeder line?

[kcc1414]

I have a small hose behind the switchbox that runs from two brass fittings, one on the top of the motor and one on the bottom. Is this a bleeder line and if so does anyone know where I can find the top brass fitting for the hose. It is a push in fitting instead of a threaded fitting. Also, any help on what size hose this is would be appreciated.

 

[oldman570]

Re: 1980 50hp merc bleeder line?

Yes that hose is a balance line and the parts are 19 &20 of the following link.

Mercury, Mercruiser, Force, etc. - CYLINDER BLOCK AND CRANKCASE ASSEMBLY - 45/50 H.P.

This will get you the part # and you can buy them at most dealers. The hose is vacuum hose that can be bought at most auto supply outlets by the foot. JMO
Oldman570

 

[Chris1956]

Re: 1980 50hp merc bleeder line?

Or are you talking about part #22 and #23 in that diaghram? That was what I though of from your description. That small hose allows residual oil from the bottom main bearing to be forced up to lubricate the top main bearing. The fittings on my inline engines were all brass screw nipples on top and one way brass valves on the bottom. Not sure what you have.

 

[kcc1414]

Re: 1980 50hp merc bleeder line?

Yes, #21 and 22 are what I was looking for. Thank you both