OK, can I replace a omc cobra drive hyd pump with a mercruiser one

Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,384
can I replace a omc cobra drive hyd pump with a mercruiser one
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
Can't see why not. Both pump into a couple of hydraulic rams. As long as there's nothing else in the circuit, then it shuld be just a straight swap. Any odea what the OMC pump is? (As in, Merc pump is a Parker-Oildyne 108 series....)
 

Fun Times

Moderator
Staff member
Joined
May 16, 2009
Messages
9,162
There's two different trim pump flow and pressure rates to consider as there is Oildyne Low Pressure/High Flow pumps and High Pressure/Low Flow pumps and it seem to have something to do with cylinder ram size. But it should work fine for you to switch over as the info below mentions the bigger rams for Alpha/Bravo can be used on Volvo/OMC. Part number 865380A25 is low pressure/high flow which from memory seems right to me for the Volvo pumps.

SEI MerCruiser Trim/Tilt Pump OE# 865380A25
Used for various MerCruiser models 1972 – Present. Complete unit.

Trim Pump Assembly. Fits Current Production Mercruiser Alpha and Bravo Outdrives, All Late Models Using New “Quick Connect” Hose Fittings. Ready To “Plug In” To Existing Boat Wire Harness. Replaces Mercruiser part# 865380A05, 865380A15 and 865380A25.
Will also work with other manufacturer sterndrives: Volvo, OMC & Yamaha.
** Use with other sterndrive manufacturers will require some minor modifications**
MerCruiser OEM#

865380A25

9C-108

UTD

 
Last edited:

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,185
There's two different trim pump flow and pressure rates to consider as there is Oildyne Low Pressure/High Flow pumps and High Pressure/Low Flow pumps and it seem to have something to do with cylinder ram size.

Ayuh,.... I don't think it matters awhole lot,....

In My pre-internet days, when I put my boat together, I used the new style plastic tank trim pump, 'n the 1" trim rams from a MC-1,....
That was in '98, or '99,...
It's still workin' just Fine,....
 

Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,384
Cant find it in my parts books or online. never even thought i would even see another yahama sterndrive.
Customers going to pull it out and get it to me.
 
Last edited:
Top