How does a OMC 5.7L Stringer Trim/tilt

BowTieGuy

Cadet
Joined
May 21, 2010
Messages
18
Ok so I am in the middle of swapping my broken 3.0 OMC engine for a 5.7. On the old engine there was a bracket on the front of the motor with a rotating shaft that would raise and lower the engine and intermediate drive for the trim. My new engine did not come with this setup so I am stuck on how to get my new engine (5.7) to go up and down so i can trim the boat.
I originally hard mounted the engine thinking i could use the tilt motor to trim it, but I have been told that wont work. Can someone please tell me how the 350's trim and send me some pictures? i cant find any information on this. If i cant find the 350 parts, i will just fab up my own bracket with the old 3.0 stuff. Thanks for the help!
 

oldsub86

Petty Officer 1st Class
Joined
Sep 9, 2008
Messages
311
Re: How does a OMC 5.7L Stringer Trim/tilt

I think you need to find a trim setup for the V8 which will be similar to what you had on the 4 cylinder.
Might be easier to add trim tabs on the boat.

Randy
 

Howard Sterndrive

Rear Admiral
Joined
Nov 5, 2008
Messages
4,603
Re: How does a OMC 5.7L Stringer Trim/tilt

the V6 and some V8's used a hydraulic trim system, where the front engine mounts are actually hydraulic trim cylinders. Some V8's used a big "saddle" type front engine mount that had a mechanical worm affair like the 3.0
 

BowTieGuy

Cadet
Joined
May 21, 2010
Messages
18
Re: How does a OMC 5.7L Stringer Trim/tilt

So how big of trim tabs should I get? Should I get single or dual actuator ones? They say a 12x9 tab should work for boats 20-22 feet. Mine is a 19' but I dont have any tilt so should I get larger ones?
 

Howard Sterndrive

Rear Admiral
Joined
Nov 5, 2008
Messages
4,603
Re: How does a OMC 5.7L Stringer Trim/tilt

Nauticus SX Smart Tabs - they're on sale here at iboats right now.
 

BowTieGuy

Cadet
Joined
May 21, 2010
Messages
18
Re: How does a OMC 5.7L Stringer Trim/tilt

Sweet! Thanks for pointing that out!
I also want to get a new water pump impeller kit. How do I tell which lower unit I have? Where are the ID numbers at? I see here on iBoats that there is a few different selections and I dont know which one I need. Can anyone help?
 
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