Replacing Mercruiser Trim Pump?

[melman]

I am going to replace my old Mercruiser trim pump. Is there a flushing procedure I should use for the lines and cylinders and also what is the best fluid to put back in when installed?<br /><br />Thanks,<br />MELMAN

 

[Don S]

Re: Replacing Mercruiser Trim Pump?

Depends on the year and model pump you have.

 

[melman]

Re: Replacing Mercruiser Trim Pump?

The original pump is a 1984. The new pump was purchased off of e-bay and is brand new. I am at work now and am not sure of the model. Both have 2 hydraulic lines and 2 cylinoids (spelling). I know this is very little info but from work that is all I have now. I do know that the electrical plug off of the old pump plugs right into the new one.<br /><br />MELMAN

 

[tommays]

Re: Replacing Mercruiser Trim Pump?

melmen<br /><br />the new pump should have a recomened oil on the pump tag i have a 1995 modle which calls for 30 wt motor oil<br /><br />as for flushing it really depends on the condition of your old oil if its dirty it will damage the new pump<br /><br />i removed all my lines because they had water in them and cleaned them in a saftey clean tank and removed the rams and moved them manualy(really hard to move)to purge out the old dirty oil.<br /><br />after reconnecting everything you can tilt up and down a few times and then crack the fittings on the rams and bleed out any other air and then fully cycle the rams a few more times to be sure there no air left<br /><br />a SERVICE MANUAL will give much more detail on doing this right<br /><br />if you system is really old there have been some major changes in pump types and pressures over the years and may cause a problem<br /><br />tommays

 

[Don S]

Re: Replacing Mercruiser Trim Pump?

Check section 5 of the Mercruiser manual, it will explain every thing you need to know. Link below to the manual.<br /> Alpha Service Manual

 

[melman]

Re: Replacing Mercruiser Trim Pump?

Thanks for the help guys. I do have a service manual but it is a 1984 and looks like it. This link and the other info. will really help. If I have instructions/book I can do it. I don't believe in doing something half a##. Your right Don, do it right the first time.<br /><br />Thanks again,<br />MELMAN