What's yours look like when running?
Mine doing work.
Mine doing work.
Propflux01
$100 Site Donor 2026
Late Timing?
Probably valves need adjusted and/or an excessively lean mixture.
- Joined
- May 28, 2014
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- 2,596
Yeah, that's not normal
Glowing red muffler on a small engine is normal nowadays.
Stock timing. Probably about 20 to 22 degrees for "emissions" when it should be closer to 30 for maximum power and fuel economy.
Its got the proper carb jet for this altitude.
The valves may need to be adjusted.
Metal begins to glow at the temperatures a normal gas engine exhaust can produce when working hard. With it being a straight pipe of thin metal it is completely possible to see the glow and everything be normal.
Yeah it's 590cc onto a 1 inch pipe.
Snapped another one a little darker this time.
Just imagine how hot that exhaust valve is.
That's waaaay too hot,
1) carb adjustment?
2) valve lash?
3) timing, (although most are not adjustable any more)
4) is that a straight pipe exhaust? if so, it's not scavenging and either needs to be larger or add a muffler to expand gas and cool it a bit.
1) carb adjustment?
2) valve lash?
3) timing, (although most are not adjustable any more)
4) is that a straight pipe exhaust? if so, it's not scavenging and either needs to be larger or add a muffler to expand gas and cool it a bit.
It's also running wide open I'm running forward speed as fast as I can go without boging down the engine or stalling the blades.
The carb has the correct jet for this altitude, I put it in my self. It definitely runs a lot better with the correct jet.
Chooching
Ain't gunna run long like that to me. What kind of fuel you running? Looks like it's way lean.
It's been running like since 2021 or 2022.
Why not just replace it with a stock muffler?
The stock muffler was a fire hazard and was kicking up dust.
Reminds me of my old Cordoba with the 400 lean burn engine. You could see exhaust manifolds glowing at night after coming off the Turnpike.
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