Crank bearing

[Bkyd Basher]

Hey guys, i and others keep noticing the outer bearing behind the flywheel keeps leaking like crazy. This is happening on new motors and from a new set of bearings. Is this normal? is there a way to stop it? When i put a little soapy water around it and blow through the fuel inlet on the carb it makes a ton of bubbles. Maybe a better set of aftermarket bearings or something? whats ur thoughts. And it seems when they start to do this they dont want to idle anymore.

 

[REVO-5309]

Running to rich by the sounds of it

 

[2revo1maxx]

It's normal to some extent, and will have little to no effect on your tune.....provided the bearing is good. I would confirm the idle gap is ok and start leaning the lsn slightly.

 

[Zdragon71]

+1^^^ on leaning lsn a tad at a time till your idle is right. Also better bearings never hurt anything but your not gonna get a 100% seal around the bearings. The leaking from this area on good bearings is usually due to running too rich for a period of time. So once your idle is holding you may want to lean the hsn a tad too. Just not too much because rich is better than lean anyday.

 

[Bkyd Basher]

ok. i was just wondering cause at first it seems ok them just a tank or two later it seems to be throwing a line on the chassi.So ur assuming the lsn is set to rich? Can it have anything to do with the fuel i run? And it wont act as an air leak? Oh and what would be the first sign of the lsn to lean? High idle if the idle gap is set properly?

 

[Bkyd Basher]

Ever heard of race sealer made by loctite? Would that seal the crank to the inner race better?