Motor height adjustment

[Larry E]

What is the adjustment necessary for the front of a GM 2.5 motor. I know how to do it just not sure where it should be initially.

Thanks
Larry E

 

[Bondo]

Re: Motor height adjustment

What is the adjustment necessary for the front of a GM 2.5 motor. I know how to do it just not sure where it should be initially.

Thanks
Larry E

Ayuh,... None of Us can remember Everybody's pertinent Info Larry...

What are ya workin' on, 'n What are ya tryin' to do,..??

 

[Larry E]

Re: Motor height adjustment

I am restoring a 1974 16' Seaswirl and just reinstalled the GM 2.5 motor. What is the protocal for adjusting the front of the motor height?

Ayuh,... None of Us can remember Everybody's pertinent Info Larry...

What are ya workin' on, 'n What are ya tryin' to do,..??

 

[Howard Sterndrive]

Re: Motor height adjustment

Assuming you have no selectrim, you want the rear "face" of the Intermediate housing sitting parallel to the transom hole in the boat. Wherever that puts the front is not important - it sits where it sits. If you do have selectrim, run the unit to the middle position and true it up.

Note how the line dimensioning C in this drawing is parallel to the transom face, and clearance top and bottom of opening is equal. That's what you want so the transom boot sits evenly around the intermediate without stress.

^^ In that pic, front mount dimensions are given for angle of deadrise. And that V6 model only came in one "height". Your 1974 had two different engine mount lengths depending on low or high profile drive. Don't take that 8 11/16 as a dimension for yours.

 

[Larry E]

Re: Motor height adjustment

WOW that is a great illustration and answer to my question.

Thanks
Larry E

Assuming you have no selectrim, you want the rear "face" of the Intermediate housing sitting parallel to the transom hole in the boat. Wherever that puts the front is not important - it sits where it sits. If you do have selectrim, run the unit to the middle position and true it up.

Note how the line dimensioning C in this drawing is parallel to the transom face, and clearance top and bottom of opening is equal. That's what you want so the transom boot sits evenly around the intermediate without stress.

^^ In that pic, front mount dimensions are given for angle of deadrise. And that V6 model only came in one "height". Your 1974 had two different engine mount lengths depending on low or high profile drive. Don't take that 8 11/16 as a dimension for yours.