Someone gave me a HRB215 Honda mower. It would start and idle but barely. It needs a new pulley (why they removed I don't know) and the new drive belt so it doesn't have a blade on it. I bought a honda carb and put it on it. It starts first pull now and idles MUCH better, but still stutters a little. I also noticed that the speed control doesn't affect anything. The cable is turning the mechanism at the end of it, but it doesn't affect the mowers rpms at all. The little spring that connects that rotating mechanism to the little arm that controls the revs when the mower bogs down seems to be stretched and not pulling on that arm at all when you adjust the speed. Is this how the mower controls the rpms? If you ever so slightly push on this arm the revs go up, but the mower still seems to stumble. I am also running the 4 cycle fuel in the can (expensive!) just to see if it cleans it out so its not stale fuel, but this mower sat for an unknown amount of time.
questions:
1. Is this arm/spring thing what actually controls the rpms of the motor when you adjust the throttle?
2. Is there a fuel filter hidden somewhere that needs to be changed?
3. What else could cause this problem? Are there adjustments on the carb that I need to look at?
1) Yes the govenor arm controlls the engine speed not the throttle cable.
The throttle cable sets the limits of travel of the govenor shaft.
2) Honda usually fit a filter on the end of the fuel outlet inside the tank, the whole assembly needs replacing.
3) The govenor arm needs to be adjusted, loosen the clamp rotate the shaft in the opposite direction that opens the throttle then clamp it back up.
Bad valve lash will affect the gas timing.
4) The spring is replaceable and considered a service item on some engines they are different so you must order using your actual engine serial number.
The throttle cable is also adjustable at the cable clamp.
Turn the throttle off then loosen the clamp and move the cable till it just activates the cut out switch the tighten the clamp.
