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Craftsman 19 hp 2 plug mower


knanuk's Avatar
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05-17-15, 09:33 AM   #1  
Craftsman 19 hp 2 plug mower

The tractor portion runs perfectly -- until you engage the mower deck -- the engine makes a "popping sound" -- and the machine does not cut well -- stalls when cutting grass.

Does anyone have any ideas?
Thanks

 
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05-17-15, 09:49 AM   #2  
Are last year's grass clippings cleaned out from the underside of the deck ?

 
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05-17-15, 09:52 AM   #3  
yes they are the blades seem to be turning free -

 
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05-17-15, 10:01 AM   #4  
And I suppose the deck belt is self-adjusting ?

A loose/worn belt might present those symptoms.

 
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05-17-15, 11:23 AM   #5  
as far as I know the belt is not self adjusting -- I have a new one here so will spend the time to change it and see -- naturally it is a long weekend here and nothing is open --

 
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05-17-15, 11:33 AM   #6  
Is the engine popping or something in the deck? What engine is on it? 19hp two cylinder sounds like a 420000 series.


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05-17-15, 11:58 AM   #7  
The engine is popping -- the Model # is 944.606191

the engine is Model # 42A707-type # 1624-01

 
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05-17-15, 12:53 PM   #8  
Have you tried new plugs?
Also you might be able to identify which cylinder is causing it.
With the engine running low to mid rpm, using an insulated tool, remove one plug wire at a time and note any difference in rpm or popping.

 
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05-17-15, 03:42 PM   #9  
Sounds like an exhaust valve not opening fully. You may want to check the valve movement.

 
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05-17-15, 04:32 PM   #10  
I agree with the notion that one cylinder is skipping and the suggestion to remove one plug wire at a time to find the skipping cylinder. It could be ignition related, fuel related, or even a valve seat that came loose.


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05-18-15, 09:33 AM   #11  
I am not mechanically inclined in the least -- I have pulled the plugs and they look OK -- Hit the carb with carb cleaner - the deck pulleys are not binding - and the same result - even going up a slight incline it is loosing power -- I will get a fuel filter tomorrow nd change that and hope that is it - otherwise find someone to put it on a trailer and take to repair as we live rurally

 
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05-23-15, 05:23 AM   #12  
Just an update ---- the problem was a blown gasket on the left side of the motor and a missing bolt -- this was remedied and all is like new -- at least for now--Thanks all

 
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