Installing HP Transom Assemblies
 

Picked up some new HP transom assemblies...have a few questions:

1. Some people recommend 4200 when installing. Others install dry. What are people recommending?

2. What are the torque values on the studs inserted into the plate? What are the torque values of the nuts on the studs?

3. What are everyone's thoughts on glassing the cut out vs leaving it alone?

Thanks.

25 ft lbs and i would use a bead of 5200. also either smear quick dry 5200 over the cut out or paint with oil base paint to seal it up

use 4200,,if or when the seal on the steering shaft goes,your gonna want to be able to remove the transom assembly.5200 will be a royal pita to remove later on.

25ft lb on the stud into the plate or on the nut.

i just replaced a transom assembly on a omc king cobra last week.the studs just get screwed tight into the assembly,omc called for 22 lbs torque on the nuts in a circular pattern.i usually don,t use 5200 on anything that may need to be removed at some point.

I ran a light bead of 4200 just inside seal. Torque to 22-23ft lbs. kind of x pattern starting with inner 4 then outer 4. 5200 is permanent and will damage fiberglass if you need to remove again. I went with HD assys also.

yep,i have seen gel coat ripped off the boat with 5200 applied to transom assembly.

Nuts are 25 ft lbs - start with middle nuts with one pass of tightening in small lower torque moving to an X pattern for torqueing in 3 or 4 passes till 25 ft lbs is obtained on all 8 nuts. Do not tighten all at 25 ft lbs again in small X pattern passes obtaining 25 ft lbs.. Merc has the diagram of torque patterns in their service manuals..

The studs themselves are 15 ft lbs - into the bell housing

Are you talking about where the round rubber gasket goes? If so I would just use something to hold the gasket in place for assembly.

Installed a new HP transom assembly dry, still dry