Chuck Dunlap wrote:

I just took apart my 13b after replacing it with my spare. I
removed

it

because it was low on power and blowing oil out the breather
tube.  I

found

the front rotor overheated. The front face was the worst, the
side

seals

were partially disintegrated and totally seized in

their slots.

The

oil seal

O-rings were completely gone on that side, only part of an
O-ring

remained

on the rear face.

The cause was a piece of silicone sealant stuck in

the E-shaft

oiling

jet,

blocking oil cooling to that rotor. I had modified the jets by

removing the

ball and spring and installing a smaller Weber jet.

This was a

bad

idea, I

think the spring would have acted as a filter and kept the
debris out.

The

offending debris came from too much sealant used for

the stock

oil

filter

bypass plate. Second lesson learned: Don't use silicone sealer

anyplace

after the oil filter. Or at least use it very sparingly.

Do you use the metering oil pump OR do you add oil in your

fuel? The

metering oil pump provides relatively little oil to the

outside of the

rotor while oil in the fuel in the ratio of 1:128 or so

provides more.

But would that be enough more to make a difference in rotor

cooling.?

Yvon Cournoyer.

I run premix 128:1, no metering pump. Seems like too small amount to
make a difference in cooling, but who knows?

Chuck Dunlap

 
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