50" Cub Cadet, Briggs & Stratton 24HP V-twin motor, Model 446777
268 total hours
Engine stopped while mowing. Blades did not strike unwanted object.
Healthy spark on both cylinders. Gas sprayed on filter while cranking, but
no chance of starting. Carburetor taken apart and cleaned about 5 hours (
or running) ago. Compression in one cylinder 80 psi, other 110 psi. Not gr
eat. Don't know what is normal.
Have no idea why it won't even "catch", just a little.
Any advise greatly appreciated.
At church, the nice sunday school teacher was
asking the class to give the name of some thing.
It's brown, runs up trees, and eats nuts from
the nut trees. The class is silent. Finally a
boy raises hand, and is recognized. "I know the
answer is Jesus, but it sure sounds like a
squirrel, to me."
In this case, I trust you didn't hit a rock or
some thing. But it sure sounds like a sheared
flywheel key, to me.
On Tuesday, May 10, 2016 at 10:21:15 AM UTC-4, 83LowRider wrote:
Safety switches work by shorting or disconnecting the ignition. He has spa
rk so it's not a safety switch.
Confirm you have spark on both cylinders. Your compression numbers are ok.
It will be a bit higher when it's actually running. Spray ether down the
carb, not on the filter. If it doesn't try to start then you should check
for a sheared key. If it does try to start you still have a carb problem.
On points ignitions, if the flywheel is turned,
you lose spark. On electronic magnetos, the
spark happens at the wrong time in the
compression cycle. So, on some motors it is
possible to have spark. But, spark at the
Thanks all, here is what happened.
Got starter fluid and it immediately started. Stopped engine and it started fine without the fluid.
Mowed for about 30 minutes and then started to lose power. Got to the point where the engine would die if I engaged the mower deck.
Another clue: If I reduce the speed to idle (idles beautifully) and then slam it on to full throttle it literally takes almost 30 seconds before top speed is reached. Makes me think that the fuel delivery cannot keep up with the demand.
Any easy way to check fuel pump delivery? If I hold a gas container overhead (gravity feed) and the problem goes away, can I suspect the pump?
Thank you, Ivan Vegvary
May 2016 04:13:51 GMT in alt.home.repair, wrote:
Silly question... But, is your fuel tank able to vent properly?
Try loosening the gas cap and see if it can start without the
assistance of fluid. If it does, mess with the throttle. If it seems
like it used to be, see if it'll roll with the deck running, as you'd
expect. If it behaves normally, it's not properly venting and it's
slowly being starved of fuel as a result when you force it to run with
the help of a squirt or two. You can check the gas cap and try to fix
it or just replace it.
MID: <nb7u27$crn$ email@example.com>
Hmmm. I most certainly don't understand how I can access a copy of a
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