Torque Sequence Help

[michigan353]

I just purchased new exhaust manifolds for my 1987 Four Winns 190 Horizon boat with a Alpha One 4.3L 175hp engine. I am trying to find the torque sequence and any other tips on installing the new manifolds when they come. Don't have very much experience at all with marine engines but wanted to try to replace these myself as I was told it is a fairly simple job. Thanks in advance for the help.

 

[Haut Medoc]

Re: Torque Sequence Help

There is no torque sequence for exhaust manifolds other than starting from the center & working towards the ends.....
Torque them to half the spec on the first pass & all the way on the second.....
Welcome to iboats, btw......​

 

[bayliner in elkmore]

Re: Torque Sequence Help

30-33 ft/lbs. should suffice.

 

[michigan353]

Re: Torque Sequence Help

Thanks for your quick reply and information... it's greatly appreciated. We will see how things go this weekend when I try to replace the manifolds... should be interesting.