OMC Stringer Installation

[Rosbullterrier]

My next step is to reinstall the 1981 3.8V6 OMC and Intermediate Box with mounts at the best height on the stringers relative to the existing transom aperture.

At present I think the transom boot channel around the intermediate comes far too close to the top of the gearbox aperture when the engine front lowers with its hydraulic mounts fully down.

If there are three levels of trim from high to low, would the middle level to enable the hull to ride flat be the standard setting?

Would that mean the intermediate box channel should be set parallel to the transom with equal up and down movement - so there would be the same gap top and bottom in the aperture?

I havn't used this boat or had power boat experience, so I don't know whether the hydraulic mounts usually remain in their middle position when on the plane or if there is a bias towards up or down.

 

[zbnutcase]

Re: OMC Stringer Installation

Impossible to say, every hull is different.

 

[Howard Sterndrive]

Re: OMC Stringer Installation

there generally is nothing to adjust - the intermediate mounts lag to the stringers.
The boat builder should have aligned the hole to the stringers and vice versa

If there are three levels of trim from high to low, would the middle level to enable the hull to ride flat be the standard setting

there's a million levels - it is infinitely adjustable

before take-off- you bring the drive all the way in - mash the throttle- while the boat is beginning to plane, you run the drive out -listening to the engine for it's easiest angle - and where you feel the most speed for the rpm- bring the bow back down if the boat starts porpoising

 

[superbenk]

Re: OMC Stringer Installation

I believe the intermediate tends to sit a bit biased toward the top of the opening normally. The hole in the center of the transom seal boot isn't perfectly centered & it needs to be installed such that the hole is offset toward the top.

 

[Rosbullterrier]

Re: OMC Stringer Installation

Thank you gents, a little thougtful discussion enlightens understanding a new untried problem.