Tohatsu 9.8 2 stroke Head bolt torque?

[Blue Pelican]

Hi,
Does anyone know the PSI torque pressure to use on the Headbolts of a 9.8 [2 stroke] Tohatsu outboard?
After spending an inordinate amount of time pouring over my 283 page Tohatsu workshop manual, it appears they have forgotten to include this simple detail.

For those that may not know, to check the thermostat on these, the head has to come off, apart from that a great motor.

Any help appreciated.

[Strolls]

It has been 4 years since Blue Pelican last logged in here, but if anyone else knows the answer to this, I'd be grateful.

I've found a couple of Tohatsu service manuals online which would seem to cover this engine - e.g this PDF - but the head bolt torques seem to be omitted.

[Bill Seal]

about 30 seconds on Google:

https://maxrules.com/nissantorque.php

or, tight but don't strip the threads

[tkeithlu]

Bolts come with a recommended torque. I've seen only one situation where I truly thought that I needed the manufacturer's word on it - the bolt torques on my airplane propeller....

Save yourself from routine difficulty. Here's a standard torque table by bolt material and thread.

https://www.boltdepot.com/fastener-i...ed-Torque.aspx

[tkeithlu]

This site has specific torques for metric stud bolts down at the bottom of the page.

https://www.raajsagarsteels.com/fast..._20_studs.html

[Strolls]

Originally Posted by Bill Seal

about 30 seconds on Google:

https://maxrules.com/nissantorque.php

or, tight but don't strip the threads

Excuse me, I assumed the values for the head bolts would be listed explicitly.

That page is just copied from the manual, which is why I overlooked it, except with the addition of the statement "The specs below DO apply to head gasket torques".