mercruiser engine rear mount bolt torque

[bipp]

I have a 78 17'Glastron with a 140hp mercrusier. I would like to know what the proper torque for the rear engine mounts are. My seloc book says 60 foot lbs. But I have an engine installation and alignment manual, number c-90-76235 it has about 7 pages, it says 35 to 40 foot lbs. 60 lbs. sounds a bit tight to me for a half inch aluminum nut.

 

[The Marine Doctor]

Re: mercruiser engine rear mount bolt torque

You might want to double check those nuts...if memory serves me right the rear mounting bolts should be 3/4 not 1/2<br /><br />TMD

 

[loadnet]

Re: mercruiser engine rear mount bolt torque

If the studs look to be in good shape I'd go by the Seloc manual and stick to the 60 ft lbs.<br /><br />You can take em down in increments from 30 ft lbs. first time around then go to 60 ft lbs to conclude the process.<br /><br />Make sure to check what the Marine Doctor mentioned because the Seloc manual doesn't specify the size of the nuts anywhere that I can find.

 

[rodbolt]

Re: mercruiser engine rear mount bolt torque

Hello all the merc manuals that I looked at say 35 FT pounds on the rear bolts<br /> Good luck and keep posting

 

[bipp]

Re: mercruiser engine rear mount bolt torque

marine doctor, the head of the bolt is 3/4 the shaft is 1/2