Craftsman 19 hp 2 plug mower

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  #1  
Old 05-17-15, 09:33 AM
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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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Old 05-17-15, 09:49 AM
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Are last year's grass clippings cleaned out from the underside of the deck ?
 
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Old 05-17-15, 09:52 AM
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yes they are the blades seem to be turning free -
 
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Old 05-17-15, 10:01 AM
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And I suppose the deck belt is self-adjusting ?

A loose/worn belt might present those symptoms.
 
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Old 05-17-15, 11:23 AM
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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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Old 05-17-15, 11:33 AM
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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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Old 05-17-15, 11:58 AM
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The engine is popping -- the Model # is 944.606191

the engine is Model # 42A707-type # 1624-01
 
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Old 05-17-15, 12:53 PM
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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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Old 05-17-15, 03:42 PM
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Sounds like an exhaust valve not opening fully. You may want to check the valve movement.
 
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Old 05-17-15, 04:32 PM
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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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Old 05-18-15, 09:33 AM
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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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Old 05-23-15, 05:23 AM
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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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