Need rod bearing number???
 

Can anyone on here tell me what the bearing number is for a 1939-1948 Mercury 100 horse Flathead with full floating rod bearing in Johnson Bronze with a STD on the crank throw and a STD on the rod journal?
Thanks in advance.

Re: Need rod bearing number???
 

99A or 99T-6211- STD.
And now I suppose you want to know where to get them?
If so try Vanpelts.


http://www.vanpeltsales.com/

Re: Need rod bearing number???
 

Thank you for your reply. What I'm actually trying to find out is the bearing number for a set of Johnson Bronze bearings which is two letters followed by two numbers. For example FB-26 or FB-46. A Freind has a bunch of Johnson Bronze bearings but no info on what they fit other than they are for flatheads or so his father had told him.
I'm trying to see if any will fit an engine I am collecting parts for.

Re: Need rod bearing number???
 

Seems to me that if you were able to determine that the journals are STD, you should be able to measure the bearings to determine if they are the correct size to give the required clearance.

Re: Need rod bearing number???
 

I have some Johnson bearings for the 1.999 crankpin marked FB26x2 which are .oo2 under, so I think the standard bearing would be FB26. Standard bearing thickness would be .109.

Re: Need rod bearing number???
 

I'd run these bearings with alittle more clearance on the rod side and sid play on the crank to improve oil flow through the bearing to help cool it. I have a new set for a .030 crank.

Re: Need rod bearing number???
 

I have a set of the FB 26 for the early small crank pin diameter (STD)


I have a set of the FB-27 for the late large crank pin diameter (STD)


Numbers after the Base Number would indicate undersize, no numbers would be (STD)

Re: Need rod bearing number???
 

I think Gary's got it right. Mine are for the smaller crankpin. I'll edit my previous post.

Re: Need rod bearing number???
 

Thank you all for your advice, suggestions and answering my question.