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Emory clothe in a big cotter pin chucked in a drill works to polish. Ghetto flap wheel basically.
I used a carbide bit for everything. they work great!Amazon has those 1/8” shank smaller drum sanding assortment.
https://www.amazon.com/Coceca-Sanding-Sleeves-Mandrels-Self-Tightening/dp/B07NVGBSRT
Plus the carbide 1/8” rotary files both are check.
https://www.amazon.com/eBoTrade-Pieces-Tungsten-Carbide-tungsten/dp/B00JL4F1SM
If you want to DIY PORTING these two will do saw cylinders.
Semi-rough surfaces actually flow more air and are cooler than mirror finish surfaces. A sandblasted texture works wellI smooth out the roughness from the carbide using the drum sanders. Then I use the buffer drums with lapping compound to polish the ports.
I use the coarse red, then fine white lapping compound then the finer simi chrome polish. I want the smoothest flow I can get. I don’t want rough ports.
https://www.amazon.com/ODOMY-Polishing-Grinding-Accessories-Attachment/dp/B07RS34SCB
Thank you! I let the saw cool down, reset both jets to 1.5 turns out, restarted the saw and it idled great for a little bit. Then I started fiddling with things again and the saw acted up right away. I'm certain it's a carburetor issue, and then you share this link for me!! what a champ! thank you.Is it the Zama carb? They often need to be rejetted.
https://www.arboristsite.com/community/threads/zama-carb-mod-cliff-note-version.275905/
After modding the carb, she still doesn't want to run. Drilled out the jets as per the link provided, added an air hole into the throttle plate also as per instructions, H seems fine, but as you can see in the video, its super boggy at low idle and really struggles to get above. once in the higher threshold she purrs though. My first thought is that its lacking fuel, but im kind of stumped. Any suggestions?
Very likely. I replaced the impulse tube with some new pvc line, but i will do it again just to be sure. If the impulse line has a hole in it, won't it run crappy at all rpm and not just the low idle?Lack of fuel. It actually sounds like your impulse hose or circuit may have a plug or a hole in it
It sounds to me like it’s extremely lean on both the low and the high circuit.Very likely. I replaced the impulse tube with some new pvc line, but i will do it again just to be sure. If the impulse line has a hole in it, won't it run crappy at all rpm and not just the low idle?
I'd go back and check the basics. Sometimes when you use line that is not fuel line it can create basic problems that are easily overlooked.I'm going to drill out the auxiliary jet more and see if that helps
I was just in the process of trying to use my walbro carb but thought I would give it another try with the Zama. I started it up with no air filter on and the fuel is just FLYING out of the intake. so the problem is that its obviously over fueling and choking itself out once it hits the lower rpm.How did the other carb work ?
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