Short time lurker, 1st time poster.
I'm fooling around with a flat head on a Baja frame.
After some research it seems the problem I am experiencing may be common with the pulsajet. The engine I believe is a 3hp, I have replaced the carb with a known 4hp as the original was worn at the throttle shaft it acted the same as both replacements.
The carb is clean and has a new diaphragm, needle and jet. To get the high speed right the needle has to be at 3/4 turn open, but the engine won't idle well at that setting. To idle the needle has to be set closer to 1 1/2 turns. Of course there is some hesitation at throttle hit.
I've checked the valves and they are not being held open by lack of lash.
This is the 3rd carb they all acted the same.
I'm thinking I will drill out the idle passage to get the idle with the 3/4 setting.
Now finally my question... Has anyone had luck with this or am I missing something?
I'm fooling around with a flat head on a Baja frame.
After some research it seems the problem I am experiencing may be common with the pulsajet. The engine I believe is a 3hp, I have replaced the carb with a known 4hp as the original was worn at the throttle shaft it acted the same as both replacements.
The carb is clean and has a new diaphragm, needle and jet. To get the high speed right the needle has to be at 3/4 turn open, but the engine won't idle well at that setting. To idle the needle has to be set closer to 1 1/2 turns. Of course there is some hesitation at throttle hit.
I've checked the valves and they are not being held open by lack of lash.
This is the 3rd carb they all acted the same.
I'm thinking I will drill out the idle passage to get the idle with the 3/4 setting.
Now finally my question... Has anyone had luck with this or am I missing something?