BR600Z crank seal leaking

[PTmowerMech]

This thing runs pretty good. Just not closed to the RPM's I think it should run. Adjusting the H out, really doesn't change anything, unless I'm closing it. Took the recoil off and found a pretty bad crank seal leak. Very wet around it.

Question: Would a crank seal have that same affect on the H adjustment?

 

[StarTech]

Yes with the BR600 being a 4 mix engine the crankcase is part of the fuel system.

RPMs per service manual
Operating speed with nozzle: 7200 rpm
Idle speed: 2500 rpm

Crankcase leakage test
at gauge pressure: 0.5 bar
under vacuum: 0.5 bar

Also make sure the valves are adjusted to spec and that the valve cover has a new gasket.

 

[Born2Mow]

Agreed. Bottom end compression on a 2-stroke controls the mixture intake.

 

[PTmowerMech]

New seal worked out like a charm.

 

[Born2Mow]

Glad to hear.

And THANKS for the positive feedback.