bertsmobile1
Lawn Royalty
- Joined
- Nov 29, 2014
- Threads
- 65
- Messages
- 24,995
I advise to shut the fuel off and starve the engine out.
The information in the previous post was spot on, air flow diminishes very rapidly with engine speed.
At 1/2 throttle you are creating about 3/5 of the heat you do WFO but only have 1/3 the air flow volume to remove it.
The last few cycles of the engine it will be running very lean and thus burn off any deposits on the plug so will start better.
A blown head gasket will always make an engine hard to start.
On mowers it drastically reduces the compression which allows the starter motor to spin faster which masks it to the untrained ear.
The information in the previous post was spot on, air flow diminishes very rapidly with engine speed.
At 1/2 throttle you are creating about 3/5 of the heat you do WFO but only have 1/3 the air flow volume to remove it.
The last few cycles of the engine it will be running very lean and thus burn off any deposits on the plug so will start better.
A blown head gasket will always make an engine hard to start.
On mowers it drastically reduces the compression which allows the starter motor to spin faster which masks it to the untrained ear.