The worst kind.
As spring made it's endlessly long approach this year, I decided I was going to go through the Gravely and get it transitioned over from snow to mow and fix a few annoyance issues with it before mowing season started. It was running good
all last summer mowing and all this winter throwing snow, I'm continually impressed by this beast. But by the end of the season, handicapped by a busted throttle lever assembly and a jury-rigged throttle cable. I also noticed a lot of play in the throttle shaft and wondered if it couldn't be running even better
. None of it a big deal, but hence the desire to just give the thing a little love and a good once-over.
Aside from just physically cleaning the machine top to bottom for the first time since I've owned it (very rewarding, by the way) - I also:
- Changed engine and transmission oils
- Replaced the coil
- Replaced the points
- Replaced the condenser
- Replaced the spark plug
- Cleaned and 'rebuilt' carb using this kit
- Installed brass throttle bushing from Brian Miller
Additionally, I got a full replacement carburetor
to rob parts from now and in the future, I took the mixture needles, main jet, throttle plate and shaft (there's a clue) and put them in the original carb.
After some mixture screw fiddling, it fires right up and idles great, but otherwise, the machine throttles very oddly. As in, I'm moving the throttle lever a VERY small distances and the engine runs WICKED hard, like it's about to run itself apart. A lot of popping on decel from such a high throttle, too. I can also tip the machine up and down and it throttles itself up and down (I can see the shaft moving slightly when I do this). It's also moving slowly and falling flat under load - I was able to mow a little with my 50" deck, but barely - just not running right. When I would dis-engage the engine would blast off again. I had to work the throttle constantly.
I will upload a video soon to show what I mean. In the meantime - has anyone experienced something like this or have an idea?
I'm not sure I have all the throttle assembly levers, springs, and bars set up just right and can't wrap my head around exactly how it should be. Though it seems to articulate the throttle shaft just fine when not running.
I am going to try to put the new carb on in full and see what happens - however, it's missing a port that exists on the original carb that I believe is a hot-air supply, is this OK to pinch the hose, or what is the best option there?
Maybe it's not the carb... could the other work have screwed something up? Points not set right? Timing messed up somehow? etc...