Motor Mounting Question

[HookSetDon]

I found the torque specs for my mounting bolts but unsure of which applies to my motor

 

theres 2 specs, 50 lbs to standard mount to transom and 90 lbs to setback and metal lift plate.

 

I think my boat 2007 nitro z6 115 opti has the metal lift plate, with the hydraulic trim. the motor mounts to a bracket that mounts to the transom, has 2 brackets with holes in it to set the pitch of the motor. Am I correct in assuming I have the setback and metal lift plate mount?

[Nitrofreak]

Yes you are but what part are you torquing the bolts on?

 

Some models have 2 seperate plates, one transom mount and one is incorporated as a unit, if yours is one unit it's 90lbs/feet,  thats the reason for the question.

[HookSetDon]

through the mount and transom of the boat

[Nitrofreak]

Then it's 90 foot pounds my friend.

[HookSetDon]

excellent, thank you sir

[BKeith]

It's mainly going to depend on the type bolts you use.

Grade 5's are approx. 60

Grade 8's are approx. 80

18SS are approx. 50

Check a standard torque spec table for the exact numbers.

I always install 1/2" thick, 3" wide SS plates on the inside of the transom. You can buy fancy ones with somebody's logo on them or just get a piece of SS bar and make your own.

When mounting a jack plate is also use only Grade 8 bolts, even if going to be used in salt water, I just complete seal them in silicon. I just don't trust the strength of SS bolts to hold with much offset.