sl10002001
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- Jun 29, 2020
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Hi All,
I have a Hustler Raptor with only about 80 hours on it, with a Kohler KT735 engine (with the smart choke). Spec is PS-KT735-3051.
About a month ago it started running like it was running out of gas or bogging down in the middle of mowing. Checked the deck for obstructions, everything was clear there. Replaced the oil/oil filter/fuel filter/air filter and plugs. Same thing.
Took it to the dealer who checked for water in the fuel plus everything I had already checked and deemed it ok; they cleaned the carb and mentioned something about a main air line being clogged (sorry I don't have the paper I got back then so i don't remember the exact wording). It ran great for about an hour after i got it back then started the same thing.
It starts and idles fine. Once you get to about half throttle it will start surging a bit, or skipping sometimes. When you engage the deck it gets much worse and if you hit any sort of heavy grass it sounds like it wants to die. The engine will bog down and sputter then surge back to speed and when it does this i sometimes notice a smell of gas. Disengaging the deck will make it run smoother but not as it should at anything above an idle. I can see the linkage for the choke moving up and down slightly as it compensates (I think) for the need for fuel.
I cleaned the carb again (and again, and again) and each time it would run for about 15min ok then start again. I was convinced this was due to the outside carb gasket i noticed was coming apart and thought pieces were getting in the carb. I ended up putting a brand new Walbro carb and gaskets on...and it is doing the same thing.
I unplugged each spark plug while it was running and heard the motor degrade but didn't stall each time. I've run a long fuel hose directly from the fuel pump onto the tank to rule out the inline filter (which is new) or anything blocking the in-tank hose. Still same thing. Finally i've replaced the fuel pump just because i had a spare one and its still running like crap.
If anyone has any suggestions or more ideas please let me know. Its so strange that it would run well for a short time after cleaning the carb, but now with a brand new carb its not any better. My dealer is at a 14day wait now and the other local guy told me 30 days since i'm not a customer. I don't want to mow my 3 acres by push mower!
Thanks in advance for any info or advice.
I have a Hustler Raptor with only about 80 hours on it, with a Kohler KT735 engine (with the smart choke). Spec is PS-KT735-3051.
About a month ago it started running like it was running out of gas or bogging down in the middle of mowing. Checked the deck for obstructions, everything was clear there. Replaced the oil/oil filter/fuel filter/air filter and plugs. Same thing.
Took it to the dealer who checked for water in the fuel plus everything I had already checked and deemed it ok; they cleaned the carb and mentioned something about a main air line being clogged (sorry I don't have the paper I got back then so i don't remember the exact wording). It ran great for about an hour after i got it back then started the same thing.
It starts and idles fine. Once you get to about half throttle it will start surging a bit, or skipping sometimes. When you engage the deck it gets much worse and if you hit any sort of heavy grass it sounds like it wants to die. The engine will bog down and sputter then surge back to speed and when it does this i sometimes notice a smell of gas. Disengaging the deck will make it run smoother but not as it should at anything above an idle. I can see the linkage for the choke moving up and down slightly as it compensates (I think) for the need for fuel.
I cleaned the carb again (and again, and again) and each time it would run for about 15min ok then start again. I was convinced this was due to the outside carb gasket i noticed was coming apart and thought pieces were getting in the carb. I ended up putting a brand new Walbro carb and gaskets on...and it is doing the same thing.
I unplugged each spark plug while it was running and heard the motor degrade but didn't stall each time. I've run a long fuel hose directly from the fuel pump onto the tank to rule out the inline filter (which is new) or anything blocking the in-tank hose. Still same thing. Finally i've replaced the fuel pump just because i had a spare one and its still running like crap.
If anyone has any suggestions or more ideas please let me know. Its so strange that it would run well for a short time after cleaning the carb, but now with a brand new carb its not any better. My dealer is at a 14day wait now and the other local guy told me 30 days since i'm not a customer. I don't want to mow my 3 acres by push mower!
Thanks in advance for any info or advice.