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8 H P B&S ?
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- 10+ Years
8 H P B&S ?
I have a 8HP B&S Industrial /Commercial engine on a troy built rotor tiller it starts very easy & runs well. for one row then dies, its starts right back up runs for one row and dies. if i can catch it when its starting to die and hit it with full choke i can keep it running but as soon as i let off of the choke it dies. I Have messed with the float level with no luck have try ed another mag same thing. its like the needle is sticking closed when its running but open once it quits. drain and flushed the tank blew out and replaced the fuel line
any ideas of what to try next???
any ideas of what to try next???
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I think you should take the carb apart and use a small wire & air to clean all the jets. Also get a can of spray-can carb cleaner with the straw nozzle to blow out the innards good. I have good luck with Wal-Marts brand. It`s cheap. ALSO make sure the float does not have any gas in it.
Then came Bronson
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- 10+ Years
John New plug today vent is open and have even loosen it
Donny ditto on venting tank
johnbron carb has been off 6 times each time it get carb cleaner and have picked at all the jets blown out with air compressor no gas in the float had a new needle and seat last season.
I have use this same tank to run the the cubs when i have the hood off
after almost 40 years ( GOT my first field car at 11) of driving junk and owning second hand equipment it shouldn't be this hard!!
Donny ditto on venting tank
johnbron carb has been off 6 times each time it get carb cleaner and have picked at all the jets blown out with air compressor no gas in the float had a new needle and seat last season.
I have use this same tank to run the the cubs when i have the hood off
after almost 40 years ( GOT my first field car at 11) of driving junk and owning second hand equipment it shouldn't be this hard!!
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I have been watching Dogman's thread here with a lot of interest. I have a 6 hp B&S on my roto-tiller and it does the very same thing.
I have cleaned the jets, carb, adjusted the float to specs in the manual and replaced needle and seat. Cap is vented properly as well. New plugs, new coil and coil wire, clean gas, clean tank, and just about anything else I could suspect including the air breather
I have the same results as Dogman. And he is right. Nothing should be this frustrating.....
I have cleaned the jets, carb, adjusted the float to specs in the manual and replaced needle and seat. Cap is vented properly as well. New plugs, new coil and coil wire, clean gas, clean tank, and just about anything else I could suspect including the air breather
I have the same results as Dogman. And he is right. Nothing should be this frustrating.....
Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship
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Dogman, I know this may sound strange, but have you checked to make sure you have fire at the sparkplug when it quits? I've never fought this particular problem on a small engine, but a bad coil on a cub will sometimes give similiar results. Might try changing the condenser, or if it is a breakerless ignition, try changing the module.
If you are not part of the solution,
you are part of the problem!!!
you are part of the problem!!!
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- 10+ Years
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Well yoose guys, When Dogman started this thread his initial post says.
Quote: if i can catch it when its starting to die and hit it with full choke i can keep it running but as soon as i let off of the choke it dies.
That symptom right there alone tells me it is not an ignition/electrical problem.
Quote: if i can catch it when its starting to die and hit it with full choke i can keep it running but as soon as i let off of the choke it dies.
That symptom right there alone tells me it is not an ignition/electrical problem.
Then came Bronson
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I know this will sound silly to most of you, but trust me... check the exhaust valve clearance.
Here's what may be happening... After running hard on one row, the exhaust valve gets hot and expands, reducing the clearance to less than zero, just enough to lose much of the compression... which is made up for with the richer mixture. When it has cooled for a short while, compression returns to normal.
Another way to check for the same thing, see how much longer it will run at a slower speed and lower temperature.
BTDT
Here's what may be happening... After running hard on one row, the exhaust valve gets hot and expands, reducing the clearance to less than zero, just enough to lose much of the compression... which is made up for with the richer mixture. When it has cooled for a short while, compression returns to normal.
Another way to check for the same thing, see how much longer it will run at a slower speed and lower temperature.
BTDT
George Willer
http://gwill.net
The most affectionate creature in the world is a wet dog. Ambrose Bierce
http://gwill.net
The most affectionate creature in the world is a wet dog. Ambrose Bierce
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- Cub Pro
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- Joined: Sun Feb 02, 2003 8:37 pm
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- Skype Name: R.H. "Rudi" Saueracker, SSM
- Tractors Owned: 1947 Cub "Granny"
1948 Cub "Ellie-Mae"
1968 Cub Lo-Boy
Dad's Putt-Putt
IH 129 CC
McCormick 100 Manure Spreader
McCormick 100-H Manure Spreader
Post Hole Digger
M-H #1 Potato Digger - Circle of Safety: Y
- Twitter ID: Rudi Saueracker, SSM
- Location: NB Dieppe, Canada
George:
You just may have something there by gum If I let it idle it will run for hours or until the gas is all used up. And also, as you indicated at the end of the row, say 150 feet or so, that is when it wants to quit. If I give it more choke then it will run, although at reduced capacity. I have to let it sit for a few minutes idleing and then it will go back up the other row.
I will have to check the exhaust valve
You just may have something there by gum If I let it idle it will run for hours or until the gas is all used up. And also, as you indicated at the end of the row, say 150 feet or so, that is when it wants to quit. If I give it more choke then it will run, although at reduced capacity. I have to let it sit for a few minutes idleing and then it will go back up the other row.
I will have to check the exhaust valve
Confusion breeds Discussion which breeds Knowledge which breeds Confidence which breeds Friendship
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- 10+ Years
Neighbor went over every thing I did then convinced me it the vales it on the bench apart as we speak awaiting rebuild kit well let you know when it goes back together if it works thanks for all the help and support
George you the man Nothing you say sound silly if you told me cub were green under the red I would believe you
George you the man Nothing you say sound silly if you told me cub were green under the red I would believe you
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