Briggs part help please
Posted May 16, 2011 - 01:06 PM
With the plastic pump came a note saying I needed to order vaccum hose part no 694000 (goes from rocker cover onto the fuel pump).
Does anyone know if this is anything special? Does it have a restrictor in it or anything?
The engine is overfuelling badly and I wonder if it could be because the new pump is supplying too much fuel and forcing it through the carb.
It is a Briggs Vanguard V twin vertical.
Initially fuel was pooling up at the back of the carb in the inlet manifold, and then eventually running to the front and out the air filter.
I replaced the float valve, and I changed the float height so it shut off sooner. The fuel pump was corroded inside so I replaced it anyway. This seemed to make it work well, so I sent it back, but a week later it was back with this backfiring etc again.
Symptoms are that it is intermittently backfiring through the carb, and occasionally pushing out a huge cloud of black smoke. This happens every few seconds or so, inbetween it runs fine.
I'm not the first person to be fiddling with this engine, so I dont really know what has been done before me.
I'm wondering if there is an ignition problem? Plugs are black on both sides as you would expect.
The carb isnt adjustable so no luck there.
Posted May 16, 2011 - 01:40 PM
Ours started popping and carrying on again and here the clearances loosened up some more, I readjusted the valves again and all has been good. Might be something to check.
Posted May 16, 2011 - 01:42 PM
As for the vacuum tube, I don't know if they would have a restrictor in the line or not since they call for a specific part number to be used. It kind of sounds like you might have an intake valve that isn't working, whether it is because of a bent pushrod or one that dropped out or some other reason.
Posted May 16, 2011 - 02:58 PM
Posted May 18, 2011 - 01:25 AM