BuggyMasters
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- Joined
- Aug 4, 2017
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- 10
This is on my friends craftsman mower. The machine is a 2014 model.
The machine backfires and pops through the carb under load. Checked the valve lash, all good. Nothing sticking. He has replaced the carb with a brand new one and brand new coil too. Starts and idles fine. If you try to go to full throttle it starts breaking up. While running and having the problem, I hit it with carb cleaner and the effect was minimal but leaned towards chocking it out vs picking it up so it was not starving for fuel. The more I played with it the more it appears that it was purposely being limited. If you have ever had a Polaris ATV as an example where they have a rev limiter for reverse, that is what it is acting like. As if it has a rev limiter. However it's not getting anywhere near an RPM that it SHOULD be limited on. This machine has a "tractor" mode on it. Seems the safety measures are all or none (it either runs or doesn't). Nothing I would think of that could act like a limiter.
Where should I look? What am I not thinking of?
The machine backfires and pops through the carb under load. Checked the valve lash, all good. Nothing sticking. He has replaced the carb with a brand new one and brand new coil too. Starts and idles fine. If you try to go to full throttle it starts breaking up. While running and having the problem, I hit it with carb cleaner and the effect was minimal but leaned towards chocking it out vs picking it up so it was not starving for fuel. The more I played with it the more it appears that it was purposely being limited. If you have ever had a Polaris ATV as an example where they have a rev limiter for reverse, that is what it is acting like. As if it has a rev limiter. However it's not getting anywhere near an RPM that it SHOULD be limited on. This machine has a "tractor" mode on it. Seems the safety measures are all or none (it either runs or doesn't). Nothing I would think of that could act like a limiter.
Where should I look? What am I not thinking of?