Timbone
Well-Known Member
It seems like ti was not so long ago that my HT engine would want to wind up to infinity. Not the case anymore.
I've solved my motor mount issues, developed a bombproof fuel line with 1/4" stainless steel tubing, and the high mileage 2 stroke motor does like to run, but it will not wind out. It runs well, very smooth at WOT, but I am finding a steady cruise of about 22mph. That's all I get. And it is not real torquey.
My FEELING is that it's not getting the fuel flow it needs to wind out.
Here are the symptoms:
1) Motor usually takes more than a few attempts to start when cold. It helps to do a lot of pumps on the primer button. My sense is that the engine is not pulling fuel into the cylinder properly. I removed the float bowl from the carb and there was plenty of fuel in there. I tweaked the copper tangs upwards just a touch to raise the float level.
2) Applying choke when starting doesn't really help.
3) Spark plug (NGK B6HS) looks pretty black and carbonny, so it doesn't seem to be running lean. There's no smoke coming out of the muffler and it isn't bogging down at WOT, things that would indicate a too rich mixture.
4) I don't think this is an airflow issue. But what would it look like if the engine needed more air to run higher RPMs and they weren't there? I would think it would be a surging/bogging down thing and I am not getting that.
Signed perplexed,
Timbone
I've solved my motor mount issues, developed a bombproof fuel line with 1/4" stainless steel tubing, and the high mileage 2 stroke motor does like to run, but it will not wind out. It runs well, very smooth at WOT, but I am finding a steady cruise of about 22mph. That's all I get. And it is not real torquey.
My FEELING is that it's not getting the fuel flow it needs to wind out.
Here are the symptoms:
1) Motor usually takes more than a few attempts to start when cold. It helps to do a lot of pumps on the primer button. My sense is that the engine is not pulling fuel into the cylinder properly. I removed the float bowl from the carb and there was plenty of fuel in there. I tweaked the copper tangs upwards just a touch to raise the float level.
2) Applying choke when starting doesn't really help.
3) Spark plug (NGK B6HS) looks pretty black and carbonny, so it doesn't seem to be running lean. There's no smoke coming out of the muffler and it isn't bogging down at WOT, things that would indicate a too rich mixture.
4) I don't think this is an airflow issue. But what would it look like if the engine needed more air to run higher RPMs and they weren't there? I would think it would be a surging/bogging down thing and I am not getting that.
Signed perplexed,
Timbone