zackmoxley
Registered Member
thats strange it didnt leak fuel. Ill take a look
Ill start with the rubber fuel line replacement.
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Fuel line from carb loses prime
- Thread starter zackmoxley
- Start date
The mechanical fuel pump has built in check valves that are not only a must for it to pump period,but to hold the fuel from draining back into the tank--they could be faulty and working well enough to pump fuel,but not hold it with the engine off.
Also if the diaphram in the pump has a pinhole or rupture it can still pump,but also let gas drain into the crankcase when the engine is off,and that can do nasty things to bearings & rings due to the oil being diluted..
Even if the fuel did drain back,there should be plenty left in the float bowl to start and run the engine at least a minute also--perhaps the carb needs an insulating spacer to prevent heat soaking into the carb and boiling off the gas--ethanol gas evaporates rapidly when it gets too hot,much faster than the old leaded gas these engines were designed to run on..
Also if the diaphram in the pump has a pinhole or rupture it can still pump,but also let gas drain into the crankcase when the engine is off,and that can do nasty things to bearings & rings due to the oil being diluted..
Even if the fuel did drain back,there should be plenty left in the float bowl to start and run the engine at least a minute also--perhaps the carb needs an insulating spacer to prevent heat soaking into the carb and boiling off the gas--ethanol gas evaporates rapidly when it gets too hot,much faster than the old leaded gas these engines were designed to run on..
Check that your choke is functioning correctly as a first stop. I had the hard start hot condition. There is a long thread where everyone tried helping me with this, the scope of the thread went all over the place. This link takes you to where the hot start problem is addressed, go a couple posts earlier to see the lead up and read from this post on and eventually the hot start problem is solved. https://ck5.com/forums/threads/quad...d-accelerator-pump.317338/page-5#post-3505478
EDIT: Rereading that thread looking for the hot start problem and now I recognize everyone helping me - at the time it was all new people, thank you guys for the help; still runs good and no more q-jet shenanigans.
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