posted 3 years ago
I've seen some great posts regarding these Tomahawk chippers at permies.com so I am hoping someone has insight on my question regarding the muffler.
First, as a bit of background, I had a disastrous experience with one of the newer direct drive models, but that's another story. Since I could not justify the cost of purchasing a new belt driven model, I ended up picking up a Tomahawk 47285 on eBay being sold somewhat locally. Unfortunately, it has become a bit of a restoration project. Within a week of having the chipper at home I had a problem with the carburetor; it was probably gummed up with old gas. I decided to replace the carb with an aftermarket one (I believe it was made in Taiwan). After changing it, the chipper wouldn't run; it just puffed black smoke. From my research, I knew the carburetor settings had to be adjusted. I was able to smooth out the engine by adjusting the high speed mixture screw. There doesn't seem to be any reaction from the engine when I adjust the idle speed screw.
Since the engine seemed to be running relatively smooth (for a 25+ year old engine), I decided to engage the clutch for the chipper assembly. The engine stalled and the belt popped off. I then discovered the belt was really old and was the wrong one. The adjustment screw was also all the way out. After purchasing and installing the right belt and then properly setting the adjustment screw, I am AMAZED at how smooth the chipper transitions between disengaging and engaging the clutch. I was expecting the engine to at least momentarily bog down but it didn't.
And now to my question in regards to the muffler I am hoping someone has insight on. I understand this is a loud engine and would likely still be loud even if I replace the muffler. That said, when I picked up the chipper, I noticed the muffler had a little black staining where the exhaust comes out. With my carburetor adjustments, the engine is not putting out any smoke, and I noticed the black area is now like a chalky white. However, when the engine is running, I can see it is glowing red inside the muffler while the outer housing is not glowing red (yes I know it is still hot). Admittedly, I haven't seen this on a small engine before, and I will further confess I am not a small engine expert. My question is: Is the glowing inside the muffler an indication it is time to replace the muffler (I'm sure it has never been done) or is this an indication that the air/gas mixture in the carb is not correct? Admittedly, I am now thinking maybe I should have coughed up the extra money for an OEM carb rather than an aftermarket.
Any insight would be appreciated.
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