Need help adjusting a small engine

[Russianwolf]

A buddy of mine had a chipper/shredder that he said wasn't working right and that I could have. I jumped at it as I have a bunch of small brush to chip and even if I needed to replace the engine it be a small amount compared to a new chipper.

He pulled and cleaned the carb out and reassemble and could get it working okay while spraying starter fluid into the carb but it would stall out when he stopped spraying. Turns out he didn;t know about the fuel shutoff that was in the off position. :tongue: (I've already teased him about that) But I think the carb needs some adjustments to run smoothly. It has three screws.

One on the bottom that is supposed to be the "adjustment screw assembly" according to the parts diagram. Then two screws on the side of the carb with the left being the "Idle regulating" and the right being the "Idle adjust".

So what should I do to get this beast running smoothly? Right now I can start it and it idles okay but kinda goes vroom vroom vroom (pause) vroom vroom vroom. not exactly what I ;m used to with my mower.

 

[Katsin]

Try searching this guy's videos on YouTube:
http://www.youtube.com/user/donyboy73

He makes great small engine advice videos. Look for carb repair vids on the type of engine that is in the chipper.

If you can't get the screws to make it run smoothly and haven't tried it yet... maybe a carb repair kit and also clean out any jet holes that you find while being careful not to enlarge the jet holes.

 

[Finatic]

The idle adjust screw should be 2.5 turns out from closed, same with the bottom screw. These are the initial settings and will give you a start. The bottom screw you want to adjust with the engine full throttle and under load. Have someone feed a branch into the chipper while you fine tune it. Stay on the rich side(more open) than lean. The idle screw, tweak it 1/4 turn at a time, letting it settle out before making another adjustment. The third screw should be idle speed. Set it at a comfortable low speed for you, before you fine tune the idle mixture.
Good Luck.

 

[Gary Beasley]

Some of those engines have a speed regulator that consists of a vane that is pushed by air being blown from the fins on the magneto. If the area in or around it gets clogged with debris you will get that loping effect as the engine tries to find it's speed.