120 hp sportjet head bolt torque

[jdnelson]

I have a mercury sportjet 120 hp engine in my 95 sea ray. It is engine # OE122750. Can anyone give me the head bolt torque specs. I am replacing the head gasket.<br /><br />Thanks

 

[B_Eager]

Re: 120 hp sportjet head bolt torque

This is from my Mercury Marine service manual for my 120xr2 sport jet, 1999.<br />Cylinder head torque=225 lb. in. then turn additional 90 degrees.<br />Need anything else??

 

[jdnelson]

Re: 120 hp sportjet head bolt torque

Thanks so much. Does the manual suggest a sequence?

 

[B_Eager]

Re: 120 hp sportjet head bolt torque

I'll have to refer back to the manual when I get home.

 

[Dhadley]

Re: 120 hp sportjet head bolt torque

Start in the middle and work toward the ends in a circular pattern.<br /><br />Good luck!

 

[B_Eager]

Re: 120 hp sportjet head bolt torque

Sorry took so long to get back. As above, start in the center and go in a cicular motion. Three torque levels<br />75 lb-in<br />then the book says 50 lb-in, think it is a typo I would figure 150 lb-in<br />and then finaly 225 lb-in

 

[twinhairdryers]

Re: 120 hp sportjet head bolt torque

I have a parts boat for sale if anyone is interested.<br />14' 1995 Regal Rush Jet Boat that has a bad cyclinder on SportJet 90. All new electronics, starter, stator ($700), etc on it, good jet drive, hull in like new condition if you want to buy a parts boat or rebuild engine (saltwater in cyclinder #3 from bilge pump failure). Has a trailer in like new condition with it, biminy top is near new condition. Would sell all for $700.00. twinhairdryers@yahoo.com