Jet Pump cone torque

[bmongan]

Hi guys.
I am new to the jet ski world. I just got a 1995 Sea-Doo SP. After trying it a few times I decided to change the jet pump oil, just because I am not sure when the previous owner did it. The manual says to torque the 3 cone bolts to 62 in lbs. It just seemed to much for those 5mm bolts. Also my cone is plastic. I torqued them to 36 in lbs. and was crossing my fingers that the bolts did not snap or the aluminum jet pump housing did not strip.
I am a machinist and can usually judge things like this. I am guessing most people just tighten these with out a torque wrench.
Any thoughts would be appreciated.
Thank you
Bill

 

[mikidymac]

I just tighten them snug just before the plastic starts to deform. Remember it is the o-ring sealing the cone not the torque.

 

[Mickirig1]

Sure it was not inch pounds? I ran into it with Chevy engines.

 

[mikidymac]

Yes, he says 62 inch lbs but even that might be too much for the plastic cone. It doesn't take much to deform them.

 

[bmongan]

Thanks
You are right, the o-ring seals the cone not the torque. I was not thinking that way. I think the 36 in. lbs I used was to much. I think what I was feeling was the plastic deforming. Maybe back in 1995 this machine came with a metal cone.
Thanks for your, help enjoy your day!!!

 

[mikidymac]

The used ones are even worse especially if the previous owner cranked the hell out of them.