Re: OT: Question for the gear heads (gas, bad gas and ether)
- From: Nate Nagel <njnagel@xxxxxxxxxxxx>
- Date: Sun, 30 Mar 2008 12:41:48 -0400
DanKMTB@xxxxxxxxx wrote:
On Mar 30, 11:15 am, Nate Nagel <njna...@xxxxxxxxxxxx> wrote:
DanK...@xxxxxxxxx wrote:
I have a question that a few of you may have some input on which may
save me some time.
Will a carb partially junked up run on ether and not on regular
gasoline if the ether is injected through the fuel like, on the fuel
pump end? I know if the carbs are junked up and you spray the ether
straight into them via the air intake it'll run, but am not sure if
it's partially due to the location of injection or entirely due to the
higher combustibility of the starting fluid.
I've got an engine I'm trying to get running, for as little $ and time
as possible. The tank was almost drained before storage 2 years ago,
but there was apparently still enough fuel left in there to get old
and junk up the carbs. Removing and rebuilding all 4 carbs is a job
I'd like to avoid, so we tried firing it on fresh gas. No dice. Next
we pulled the fuel line to check the fuel pump pressure. Check.
Starting fluid into the airbox: Run & starve. Then on a whim to see
how junked up the carbs were, we removed the fuel line from the outlet
of the fuel pump and shot starting fluid into there. It ran just like
we sprayed it into the air box, which surprised me. Now I'm wondering
if I don't have a prayer of cleaning these a bit to get it running.
When you try to start it on gas, does it act like it's flooding or
starving?
Starving.
When you have the engine off, if you stick your head over one
of the primary carbs, can you see fuel squirt out of the accelerator
pump nozzles when you open the throttle?
I'll have to check. Getting my head over one of the carbs without
removing the carb is going to be tricky. This is a motorcycle -
should have mentioned that in the first post. Also, the time it was
sitting was indoors, in a heated area. I don't think that'll keep the
carbs from gumming up though.
Have you replaced all fuel filters?
No. I removed the fuel line at the carb and turned the engine over,
and the fuel flow was good, so I assumed the problem was in the carb.
Thats why I was surprised when I reattached the fuel line to the carb,
removed it at the fuel pump, and sprayed ether into it it started up.
I forget where the filter fits into this sequence, I'll check and
replace when I am at the bike again, as well as seeing if I can find a
way to look into one of those carbs without removing it.
well if it will run on ether through the fuel line the needles aren't stuck to the seats which is the obvious failure mode. If it were flooding I would expect the floats to be varnished to the bottom of the bowls but you say it's starving. I'm having a hard time thinking of anything that could cause this other than a clogged filter or a failed pump.
nate
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