Question about Craftsman 17.5 hp 42 in. Deck Lawn Tractor - CA Model
As in first post I stated mower would die on the slightest decline but seems to do fine on an incline. I am talking the slightest of inclines and not hills, They are barely noticeable. At the end of the year, I always do a complete tuneup and changing oil was one of those things. I am unaware of where the oil snsor cutoff is on the rider and how would I repair or correct this problem. Also if float is "out of whack" how would I readjust or repair. What would be your suggestions for getting my rider running again. I have mowed this same lawn for 5 years without any problems on the declines or inclines, so interested in your thoughts and suggestions. thank you.
I agree with Rockit on this one. It keeps giving me that gut feeling of "fuel flow" (regulation) problem.
Meaning (I know you did it!) Fuel Tank-> Fuel Filter-> Fuel Line-> Fuel Cutoff-> Carb-> Fuel Ports/Air Ports-> Float-> Needle Valve-> Needle Seat-> Intake.
I swear, I want to say pull that carb, and slap another one on (you would be amazed what you can do with a 4-stroke, you can throw almost ANY carb from ANY motor on one, especially a Briggs) on there and test. In your case, I would suspect (as you said), a bad Float Bowl, Needle Seat, or Needle Valve.
In any of those 3, simply tearing the carb COMPLETELY down, you can check the Float Bowl by simply shaking it. If it has fluid inside, it is bad. Replace it! If not, check your Needle Valve and Needle Seat (don't lose that spring man!).
In the Needle instance, simply clean the seat with Gum-Out (etc.), and clean the Needle itself with some paper towel (they come in two varieties now, rubber tipped, and metal tipped, either will show right off if junk is on them.) Junk = Needle not seating = way too much fuel, or, not enough (if badly junked up). As for the seat, Gum-Out & Compressed Air. But do this to the ENTIRE carb, with the ENTIRE carb pulled apart. (You DID remember to write down how it came apart......right?)
Be ESPECIALLY mindful of an screen(s) on/around the Needle Seat. They WILL be the first to get trashed up. This is a common occurence, and no one's fault, time, fuel, and trash take their toll!
Now, that said, double check for a trashy Fuel Filter, or a chunk of trash IN the fuel line (even grass will do it). Check for "vapor lock" as well (easy check): Your gas cap on your tank is supposed to "breathe". If it ain't, vapor lock occurs, hence, not the correct amount of fuel! (I know, sounds stupid, but it happens! Just spray your cap down, from the inside out, you should see fluid come out the top side, where a little "filter" or equivelent is)
One side note: Just for the sake of it, make sure your one of your kill switches is not grounding out, and that your plug wire isn't doing it either.
This will be a simple fix. The hardest thing is finding the simplest thing to fix. (Otherwise, you did a GOOD job on the rest!)
And if you already did the above in your "tune up", I apologize for the lengthy reply!
Posted on May 30, 2009
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Posted on Jan 02, 2017
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