crankpin diameter

[lucasracing]

I hope I am in the right spot to post this question.We are redesigning an early French racing engine.We plan to use a two piece split cage needle bearing on the big end of the connecting rod.This appears to be a style of bearing used on outboard engines.My question is what engine that uses a split needle connecting rod bearing has the largest crankpin diameter?Or in other words what outboard has the largest two piece style connecting rod bearing? I would greatly appreciate any help you could give me .Greg

 

[Hooty]

Re: crankpin diameter

I don't know about the largest crankpin Greg, but the small bore OMC V6 crankpin is 1.375.<br />Hope this helps.<br /><br />c/6<br />Hooty

 

[captweed]

Re: crankpin diameter

a merc 2.5 L V-6 rod journal is 1.181 the main is 1.3750,Your Omc is a much beefier engine,Merc's are little grenades waiting to exlode!Merc's are used for racing cause of their power to weight ratio,the rev quicker.Yamaha makes a heavy engine also,not sure of bearing type,They are 1/2 again bearing cost