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- Dec 29, 2015
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Having an odd MT problem with a 462. Saw has been ported and Muffler Modded, but ignition timing untouched.
Saw purchased used from a dealer with 58 minutes of run time as per the computer when plugged in. Saw was nearly perfect inside and out. Dealer (whom I fully trust) ran saw stock and found zero issues-which means there weren’t any. The saw only shows the issue after 4 or 5 long cuts, so it’s possible the dealer didn’t run the saw enough for it to show.
The saw was pulled apart for a vacuum and pressure test after the issue. No leaks found. The exhaust is a bit challenging to block off on the model with its odd structure. Flywheel pulled to insure key didn’t shear-it did not.
Pump side of carb opened to insure no debris got in and plugged up screen. Looked perfect without debris.
Saw ran on 2 different mixes at 40:1. Both Efree with Motul800 and VP with Saber. Did same thing on both mixes.
The throttle linkage is not sticking. If it were, slowing chain speed by putting load on it wouldn’t change things (unless the MT could compensate for that-I guess that’s possible).
Did factory V2 reset 3X. Made no difference.
I am a bit perplexed. Any help appreciated. I tighten down the carb snugger after pulling it a part a 3rd time, but ran out of daylight for retesting. Next I plan on pulling the handle to inspect the linkage rod.
Here’s the saw. 25” 3/8 7pin in poplar test log. It’s hero wood, but I’m not gonna ruin a good oak log for testing, the poplar has no other use for me. Fast forward to 2:30 to see the issue.
Saw purchased used from a dealer with 58 minutes of run time as per the computer when plugged in. Saw was nearly perfect inside and out. Dealer (whom I fully trust) ran saw stock and found zero issues-which means there weren’t any. The saw only shows the issue after 4 or 5 long cuts, so it’s possible the dealer didn’t run the saw enough for it to show.
The saw was pulled apart for a vacuum and pressure test after the issue. No leaks found. The exhaust is a bit challenging to block off on the model with its odd structure. Flywheel pulled to insure key didn’t shear-it did not.
Pump side of carb opened to insure no debris got in and plugged up screen. Looked perfect without debris.
Saw ran on 2 different mixes at 40:1. Both Efree with Motul800 and VP with Saber. Did same thing on both mixes.
The throttle linkage is not sticking. If it were, slowing chain speed by putting load on it wouldn’t change things (unless the MT could compensate for that-I guess that’s possible).
Did factory V2 reset 3X. Made no difference.
I am a bit perplexed. Any help appreciated. I tighten down the carb snugger after pulling it a part a 3rd time, but ran out of daylight for retesting. Next I plan on pulling the handle to inspect the linkage rod.
Here’s the saw. 25” 3/8 7pin in poplar test log. It’s hero wood, but I’m not gonna ruin a good oak log for testing, the poplar has no other use for me. Fast forward to 2:30 to see the issue.
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