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Correct Main Bearing grease

Old Marine Engine » One and Two Cylinder Gas Inboards » Correct Main Bearing grease « Previous Next »

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caroga_lake
New member
Username: caroga_lake

Post Number: 2
Registered: 08-2014
Posted on Friday, May 08, 2015 - 10:54 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Due to the persistance of Bruce Hall who located a 3 HP Engine built by or for the Atlantic Boat Company of Amesbury Mass around 1907 and the kindness of Hugh Durgen who was willing to sell it, I now can continue the restoration of my pre 1900 Atlantic Sea Skiff also built by thr Atlantic Boat Company.
Working with Andy Schmerhorn and Bruce we examined, reassembled and ran the engine for a short time.
In trying to learn as much as I can about these motors since they are new to me, I was reading about what would be the best grease for the Main Crankshaft Bearings.
What confusion that created for me as it seems there is no consencise. High temp, low temp, sticky, stringy. Lithium based was one common denominator but no other that I could find.
A Lucus sticky was in several articles.
What do the experts from Old Marine Engine recommend ??
Thanks Walter
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jb_castagnos
Senior Member
Username: jb_castagnos

Post Number: 1056
Registered: 07-2002


Posted on Friday, May 08, 2015 - 02:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Any good grease will lube the bearings, if the bearings are good, no problem. If the bearings are loose, a heavy fiber grease may last longer and help seal crankcase pressure. Good bearings will hold grease and when screwing down the cups you will hit a hydraulic lock. worn bearings will let the grease bypass and you can continue screwing down on the cup.
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ernie
Senior Member
Username: ernie

Post Number: 2058
Registered: 01-2002


Posted on Friday, May 08, 2015 - 09:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

I agree with JB.
I use plain old wheel bearing grease in all my engines unless the bearings are worn. Then I use some sort of thick stuff. The thicker the better
Hope this helps
Ernie
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caroga_lake
New member
Username: caroga_lake

Post Number: 3
Registered: 08-2014
Posted on Friday, May 08, 2015 - 10:46 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only)

Thanks to both of you for the information, Very helpful for me.
Walter

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