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Idle speed & electrical help

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Alright guys reaching out for some help here. Just obtained an old gator, 2000'ish 4x2, that is in need of love, time, money and parts... I am methodically making my way through this thing to square it away for service at my home. With the help of this forum ive drained the fuel tank, put in fresh gas, new fuel filter, new air filter. removed all body panels, thorough cleaning which took a full day of very disgusting work.

Today I plan on doing oil, transmission fluid (adding pemo friction modifier for wet brakes), and attempt to trouble shoot two issues that are at the top of the list....

The idle:
The machine grinds when it goes into gear, you really have to forcefully move the shifter, in and out of gear. if i choke it to lower the idle, it shifts butter smooth. when i look at the carb (FE290D) there are really only two screws that will move levers. the throttle is not resting on the stop for the idle adjustment screw to do anything. it is a hair off that screw, so turning the screw will only raise the idle. if i push the lever over towards the screw (stretching the spring slightly) the idle comes down and everything seems fine. i have no idea how to lower the idle without stretching one of the springs (which i wouldnt do).

I thought about removing the carburetor and giving it to a small engine shop for full cleaning but i am afraid to disturb the seals and not be able to obtain new ones for a machine this old.

Onto the electric situation:
Sometimes there is no power to the headlights or parking brake lamp up front. I can jumper the plug for the headlight switch and it doesnt do anything. I check the + feed to the headlight switch at the plug while grounding on the frame, sometimes there is no voltage. When the headlights dont work, the parking brake light does not work either. i turn the machine off or wait a while, everything works again. I assumed it might have be voltage regulator, but i do get 13 volts at the headlight plug when they feel like working. after searching around here I thought maybe i should replace the ignition switch?


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