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....)
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#
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,....
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.