Powerhead Bolt Questions

[Toyman991]

I'm going to pull the powerhead off my 1962 Johnson RX-10 28hp this weekend to replace the upper shift rod. The screws that hold the powerhead to the leg are rusty and I'd like to replace them. I removed one so that I could take it to the hardware store. <br /><br />Today, I bought some stainless screws to replace the old ones. Is stainless OK? What torque should I apply when I reassemble the motor? Should I use anti-seize or locktite or nothing at all? Since the new screws don't have the small flange that the originals have, should I use a washer or lock washer? <br /><br />Sorry for all the questions but my Clymer manual does not contain this information. Any help you folks can offer is greatly appreciated.<br /><br />John

 

[Joe Reeves]

Re: Powerhead Bolt Questions

Coat the bolts with an Anti Corrossive grease. Use S/S lockwashers (absolutely!). Torque?, Just make sure they're tight.

 

[alcan]

Re: Powerhead Bolt Questions

Hi Toyman<br />Stainless fasteners are great. You might want to consider usind socket head screws (allen heads) they look kind of cool and work well in tight places (stainless of course). I like to use some type of anti sieze, anti corrosion greese,etc. I guess removable loctite would be ok. They use this type stuff on the newer model motors. I really don't care for it though in most cases. I am not sure of an exact torque value. How ever if you look in your Clymer manual I'll bet there is a page with common torque values. This is a just a guide to use for general fasteners that they do not give a specific value and sequince for, such as head bolts and such. As some one pointed out the other day these general values are for the size of the threaded part not the head size. Also being a just a guide, this will leave room for you to use good judgement.

 

[Paul Moir]

Re: Powerhead Bolt Questions

My OEM manual has no torque values for the powerhead mounting bolts, so go with 60-80 in/lbs. That's the manual's standard torque for 1/4" fasteners, which is the only type that holds the powerhead on. Keep in mind that the first three right hand side bolts, when looking at the back of the engine, pass directly into the exhaust chamber. They'll need to be sealed to keep the exhaust gasses in. They tend to get a little cooked too - no doubt you found them a little hard to remove.<br /><br />Alcan - great idea on the socket head cap screws!<br /><br />Good luck!