sblunier
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- Joined
- Aug 4, 2006
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- Steve Blunier "Mr. Plow" (Central IL)
Earl,
Imagine your throttle cable had unlimited travel....what would keep the little speed control arm it hooks to from allowing the engine to overspeed????....The throttle stop. If you loosen the bolt that holds it slightly, it can be rotated to limit the control arm's travel to provide a "throttle stop" at the correct max RPM's then retightened to maintain that limit.
In your case you don;t have unlimited throttle cable travel....in fact it's not enough travel, because your throttle cable assembly is still limiting RPM's to under 3600. Like I said below, slide the cable back another 1/8", set the throttle at 3650 no load, then rotate the throttle stop to hold it there.
Once no load RPM is set (assuming the governor has been set up correctly, per manual, and the governor spring is in the correct holes on the governor arm and the speed control arm) the governor will automatically maintain engine RPM to the throttle setting (up to max no load) under any/all load conditions.
Notice how when the engine is at WOT no load, the carb throttle plate is only open about 1/8 of the way? This is the governor working to limit the engine fuel supply and maintain max no load speed (choked down due to no load). With a deck or thrower on the throttle shaft will be almost wide open...lots of load needs more fuel/air to maintain max speed. When overloaded, the governor opens the carb 100% and max fuel/air is delivered to engine, but load exceeds engine capability and the RPM's drop...eventualy until it dies, or you unload it and the governor regains throttling control.
This is very different when compared to a car engine (ungoverned, but electronically rev limited for safety), as car engines are not meant to run at constant speed all day like equipment engines......your foot on the pedal is the governor (or even better the cruise control).
Imagine your throttle cable had unlimited travel....what would keep the little speed control arm it hooks to from allowing the engine to overspeed????....The throttle stop. If you loosen the bolt that holds it slightly, it can be rotated to limit the control arm's travel to provide a "throttle stop" at the correct max RPM's then retightened to maintain that limit.
In your case you don;t have unlimited throttle cable travel....in fact it's not enough travel, because your throttle cable assembly is still limiting RPM's to under 3600. Like I said below, slide the cable back another 1/8", set the throttle at 3650 no load, then rotate the throttle stop to hold it there.
Once no load RPM is set (assuming the governor has been set up correctly, per manual, and the governor spring is in the correct holes on the governor arm and the speed control arm) the governor will automatically maintain engine RPM to the throttle setting (up to max no load) under any/all load conditions.
Notice how when the engine is at WOT no load, the carb throttle plate is only open about 1/8 of the way? This is the governor working to limit the engine fuel supply and maintain max no load speed (choked down due to no load). With a deck or thrower on the throttle shaft will be almost wide open...lots of load needs more fuel/air to maintain max speed. When overloaded, the governor opens the carb 100% and max fuel/air is delivered to engine, but load exceeds engine capability and the RPM's drop...eventualy until it dies, or you unload it and the governor regains throttling control.
This is very different when compared to a car engine (ungoverned, but electronically rev limited for safety), as car engines are not meant to run at constant speed all day like equipment engines......your foot on the pedal is the governor (or even better the cruise control).
