2001 Scrambler 500 carb dripping - Polaris ATV Forum
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post #1 of 4 (permalink) Old 10-08-2019, 12:51 PM Thread Starter
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2001 Scrambler 500 carb dripping

I put a carb kit into the carb but it still drips a bit(not much) if I leave the gas on. It comes out of the drain at the bottom of the bowl. The hose is long gone so it drips on to the engine, which I really don't like. But does anyone know how measure and how to set and what the float level is supposed to be. I've always done it by "eye" but, it don't seem to be working on this one. I find it odd too, that with the new needle and seat, I replaced the seat, and there isn't any screw or anything to hold the seat in. It didn't seem like a very snug fit to me. I wonder if that is where the fuel is getting by causing the overflow.
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post #2 of 4 (permalink) Old 10-08-2019, 01:36 PM
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The 0-ring under the needle valve seat is what holds it in and seals the fuel from getting around it.
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post #3 of 4 (permalink) Old 10-09-2019, 01:21 AM
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A digital vernier caliper is the best way Iíve found to measure the float height. They can be found on eBay for around $11. Make sure you get one that has a thumbscrew to lock the caliper in place at your desired measurement. I recommend getting a service manual for your year and model to figure out the correct setting. If you ask, itís possible someone on here will have one and e-mail it to you. The manual will also tell you the proper way to take the measurement. Iíve found that on these carbs, the proper float height is pretty important. +/- 2mm has caused loading up or fuel starvation that getting it right fixed.
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post #4 of 4 (permalink) Old 10-09-2019, 05:19 AM Thread Starter
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Quote:
Originally Posted by micoviso View Post
A digital vernier caliper is the best way Iíve found to measure the float height. They can be found on eBay for around $11. Make sure you get one that has a thumbscrew to lock the caliper in place at your desired measurement. I recommend getting a service manual for your year and model to figure out the correct setting. If you ask, itís possible someone on here will have one and e-mail it to you. The manual will also tell you the proper way to take the measurement. Iíve found that on these carbs, the proper float height is pretty important. +/- 2mm has caused loading up or fuel starvation that getting it right fixed.
I have a set of digital calipers already.
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