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Compression test wd45
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TomYaz View Drop Down
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    Posted: 14 Jan 2023 at 7:08pm

gasser

Dies when try to put past idle...probably bad carb.

Anyhoo thought I'd do a compression test

From radiator to the seat. - 80psi-80-80-90.  Did when tractor was ice cold. How does that rate?

Plugs black.
If its not an All-Crop, it all crap!
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DrAllis View Drop Down
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Throttle WIDE OPEN ?? with a battery charger on the battery ??? pretty poor....125 psi is spec.
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TomYaz View Drop Down
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Originally posted by DrAllis DrAllis wrote:

Throttle WIDE OPEN ?? with a battery charger on the battery ??? pretty poor....125 psi is spec.

Throttle needs to be wide open to do a compression test?  Wasnt aware of that...

Battery was charged good, no problem cranking.
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Joined: 12 Sep 2009
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Re-test with throttle wide open.
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Les Kerf View Drop Down
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Even if it actually has only 80 psi it shouldn't die when you rev it up if everything else is in order (carb, ignition).  Hard starting and low power, yes.
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.

Has the tractor been sitting a long time so rings got stiff?

Fuel restriction is the most common for that scenario.

Check the spark plugs against symptom photos.

.
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TomYaz View Drop Down
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Yeah,

I dont think the dieing has anything to do with compression, I just decided to check compression anyway becasue the tractor runs poorly even before the the dieing started.

Going to re-check the compression.

Thanks, know I can always get good insights here.
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Originally posted by jvin248 jvin248 wrote:

.

Has the tractor been sitting a long time so rings got stiff?

Fuel restriction is the most common for that scenario.

Check the spark plugs against symptom photos.

.

No tractor has not been sitting.  Yes I think its a carb problem. Plugs need replaced.
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WF owner View Drop Down
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Check the easy stuff first.

Before you tear into the carburetor, make sure your fuel flow is ok. Take the gas line off the carb and turn the gas on. Leave it on for a minimum of a full minute. Flow should stay steady. It's not uncommon to have foreign matter built up in the inlet of the sediment bowl, restricting the flow.
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TomYaz View Drop Down
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Originally posted by WF owner WF owner wrote:

Check the easy stuff first.

Before you tear into the carburetor, make sure your fuel flow is ok. Take the gas line off the carb and turn the gas on. Leave it on for a minimum of a full minute. Flow should stay steady. It's not uncommon to have foreign matter built up in the inlet of the sediment bowl, restricting the flow.

Thats fine, have a inline filter.
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Joined: 12 May 2013
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Points: 5029 		Post Options Post Options   Thanks (0) Thanks(0)   Quote WF owner Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jan 2023 at 3:49pm
Originally posted by TomYaz TomYaz wrote:

Originally posted by WF owner WF owner wrote:

Check the easy stuff first.

Before you tear into the carburetor, make sure your fuel flow is ok. Take the gas line off the carb and turn the gas on. Leave it on for a minimum of a full minute. Flow should stay steady. It's not uncommon to have foreign matter built up in the inlet of the sediment bowl, restricting the flow.

Thats fine, have a inline filter.

Debris plugging the tank outlet could still be your problem. I would definitely take the gas line off the carburetor and check the flow. It wouldn't surprise me if it slows drastically after 30 seconds.
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Points: 617 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Boss Man Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jan 2023 at 4:15pm
Plugs are black= over fueling/ lack of air. Is the air cleaner hooked up? When was the last time the air cleaner was serviced? It is winter, any moisture could be creating ice and restricting air flow. Had an Oliver that would run in the shop but not outside. Air cleaner was full of water 
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The poor running was back in summer. Addressing it now so Its not about the cold weather. Fuel flow was the first thing I checked, its ok. Service the air cleaner every other year or so.  I did new compression test with throttle up..  125-115-115-120

Going to work on the carb, convert to electronic ignition, change the plugs.
If its not an All-Crop, it all crap!
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Points: 1315 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Les Kerf Quote  Post ReplyReply Direct Link To This Post Posted: 15 Jan 2023 at 8:43pm
Originally posted by TomYaz TomYaz wrote:

...  I did new compression test with throttle up..  125-115-115-120 ...


That engine will run a long time yet.

I would address the ignition first.
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