OMC stringer system trim

[proline2]

I have a l984 OMC stringer system with a 3.8 v-6 engine. The system has the hydraulic cylinders in the front of the engine. I need to replace the valve body but I can't find anyplace where I can get a new one. I have thought about adapting a Mercruiser power trim pump to the boat as another option. Has anybody out there tried the Mercruiser pump, and if so how well does it work? Does anybody know where I can get a replacement valve body for my trim pump?<br />Thanks

 

[adrew]

Re: OMC stringer system trim

try ebay, I believe I saw the trim system there recently.

 

[proline2]

Re: OMC stringer system trim

That one wasn't the hydraulic system, and it's gone anyway. <br />Thanks

 

[Boatist]

Re: OMC stringer system trim

Proline2<br />Have you tried Johnson/Evinrude dealers??

 

[proline2]

Re: OMC stringer system trim

I tried the local dealer two years ago and he told me that none of the needed parts were listed in the parts books anymore. He couldn't get a new or used valve body or any other parts for my system. Therefore I've attempted to repair the valve body and got it working, but somewhere there is a leak which lets the trim change when under power. I also rebuilt the trim cylinders on the front of the engine, so the seals there should be very good. I just need to have a good trim pump, beit an OMC or some other make.

 

[dpminc]

Re: OMC stringer system trim

This is a prestolite pump, and a similar valve body was found on OMC outboards(johnson/e-rude)into the late 80's. These are adaptable to the I/O application. You could try www.tcoutboard.com and see if they have a used one. I dont think the MCM pump will work well because they, at least for some time, were a high volume,low pressure setup and you need a high pressure, low volume type. If push-comes-to-shove, you could try and adapt the prestolite system found on Chryslers, Forces,early Suzuki's and some OMC outboards with tilt only. Good Luck, as these are all getting hard to find!!

 

[proline2]

Re: OMC stringer system trim

Thanks, I will follow up on the outboard pump idea.

 

[butch290]

Re: OMC stringer system trim

Proline2, I have the same thing in a 5.7, and if they give me trouble, I'm planning to make new motor mounts,get rid of pump & cyl's and trim the boat with the trim tabs, my 2 cents.

 

[proline2]

Re: OMC stringer system trim

That certainly is a possibility I hadn't thought of. I'm sure you could make it work that way, I'd just like to keep things close to original design if possible. I've thought of making a bracket to bolt the front of the engine down and just leaving it there, since that's the position I most often use when the trim works, or should I say when it did work. Same idea as what you had, just without the trim tabs.

 

[jawzzy]

Re: OMC stringer system trim

try doug russell. I found a listing for ALL the hydralic pump parts, including a complete actual pump. <br /> http://www.dougrussell.com

 

[clanton]

Re: OMC stringer system trim

The parts book does not show a good breakdown of pump, but pump has to have a check valve to hold cylinders in position. These check valves are usely located inside the pump/valve body, locate these check valves and repair them. Most have a small o-ring on the end of the valve.