George,

Will the 17 hp ohv carbys (640072a/640330A) fit on to the tvt 691 stock manifold?
Is there any modification s required?

Thanks.
Nigel

Bert,

Thanks for the heads up on the fuel pulse scenario  -i will investigate further.

FYI - Fosters is an export only beer these days as it tastes like stale wine. We just send it around the world so everyone else can drink it now and again and pretend they are an Aussie for a brief moment.

Real aussie beer gives us powers that make upside down mower racing possible.

George,

Your on the money with your deductions mate.
Most tracks here run clock wise and bar a few left handers thrown in here and there right hand turns are more numerous, usually faster and gradually deteriorate in condition as the race meet progresses- hence the front end bounce.

I had thought of this as my next option.

When you say run there breather pipe to the catch can, i assume i should still have some means of pressure equalization to the crank case,
ie: breather on catch can?

Thanks.

G'Day,

I am racing in australia using a stock tecumseh tvt691.

On rough tracks where the front end bounces a fair bit I am getting oil from the crankcase breather into the air filter housing.
This happens to the degree that it runs out of the bottom of the air filter.

I have fitted a catch can and this has solved the problem to a degree until the can is about quarter full.

Is this a common prob for tvt691? As no one else has this prob with other breeds of engine - the only other tvt691 i know of experiences the same issue.

Any help appreciated.