bvm 91
 

my mav pro has ran fine for 2 yrs
but the last 2 flts it is not holding
the inflt mix setting at high end
it is putting out smoke/no smoke/smoke/no smoke
no fuel leaks/changed pipe o rings/no air in fuel lines
anyone ever have this proplem
thanks
vinny

RE: bvm 91
 

What about the carb o-ring (if it has one)?

RE: bvm 91
 

HI, the only way the engine can react as you decribe is it is losing fuel pressure either from the o ring on the pipe or a cracked brass tube in the fuel tank, if the brass has been in their for several years it will crack.
Rcpete

RE: bvm 91
 

mike i dont think there is a o-ring on carb
but will check

pete
i will take out the tanks and check the brass tubing
the mav pro is about 6 yrs old

thanks
vinny

RE: bvm 91
 

You may have picked up some sort of trash in your fuel hose. It happened to me one time with an OS.91. The trash will either be at the inflight needle or inside the nipple at the carburetor.

You can flush it out of your fuel hose by disconnecting your fuel hose from your tank (or tanks) and then back flush your fuel hose (or hoses) from where it attaches to your carburetor. Try to catch the fuel in a glass jar so you can see what comes out. You may have to disassemble your carb to get any trash that may have found it's way into it.

RE: bvm 91
 

gary
will do that also
thanks
vinny

RE: bvm 91
 

Hey Vinny:

Check the condition of your inflight mixture control.

Antony

RE: bvm 91
 

antony
will swap out today and try
thanks
vinny

RE: bvm 91
 

it was the infight mixture control
thanks for help
vinny