Checked the fuel line, getting good flow. Had previously cleaned the tank. Replaced the thermostat on the exhaust with another used one, no change. Think I will give up at this point. Maybe use as a parts mower. Thank you everyone for all the suggestions.
Stumped, slow start, jumps to full throttle
- Thread starter slow030
- Start date
Again those are a fixed speed as in RPM engines. Pull the cord. She revs to say 3500rpm all day long.
If she is not reaching full rpm, throttle linkage is messed up or maybe the top engine cowl is on wrong. Something is holding the carb linkage in a static position. Like grass and rust for two examples.
You can bend the metal tab the throttle linkage and spring are on to adjust the max revs.
Millions of Briggs autochoke videos on youtube. Very simple design which works pretty good.
If you pull the fuel hose off AT the carb inlet, draining a good amount into a glass jar, proves two things. One is the fuel tank cap IS venting proper. Next is the tank, fuel lines and any filter are not clogged up. Tank to carb has proper solid fat fuel flow.
After the above, clean the carb or replace.
Might verify spark with an open gap tester. They are $1.39 delivered to your door. Could be a weak ignition coil. I just replaced two, one just like yours in my fleet.
Might verify spark with an open gap tester. They are $1.39 delivered to your door. Could be a weak ignition coil. I just replaced two, one just like yours in my fleet.
Again, that engine, should operate, at say 3600rpm, all day long.
Yes one could have a throttle cable IF your mower has one to adjust rpm. You don't and shouldn't need to adjust rpm.
Autochoke is made for a single speed engine, for the most part.
Wondering if you possibly got the throttle linkage messed up?
There is a metal tab one could bend to increase rpm.
These are super simple machines.
I do see a small tweak you need to make on the thermostat.
The blue oval area needs to be in the center of the red lines on both axis. Push the metal arm (yellow arrow) the same direction as it is pointed. There are two plastic lines (red lines) on each axis telling you where it needs to be.
Think the front edge of the thermostat arm in blue is to be like 1/16" to 1/8" shy of touching the air vane.
The blue oval area needs to be in the center of the red lines on both axis. Push the metal arm (yellow arrow) the same direction as it is pointed. There are two plastic lines (red lines) on each axis telling you where it needs to be.
Think the front edge of the thermostat arm in blue is to be like 1/16" to 1/8" shy of touching the air vane.