Posted by Steve@Advance on June 04, 2022 at 08:05:56 from (99.190.215.237):
In Reply to: CO OP E4 posted by pager on June 04, 2022 at 05:08:46:
Sounds like you have 2 separate problems.
1. The packing on the gas tank valve is leaking. It may just need the nut snugged enough to stop the leak and put some tension on the stem so the valve has some resistance to turning.
If the nut is already tight it may need some additional packing. You can back the nut off the threads, twist some teflon tape into a string, wrap it around the stem and replace the nut. Keep adding tape until the leak is stopped and the stem has some resistance to turning.
2. The leaking carb. Very common for a gravity flow carb to leak gas if the fuel is left on. It should always be turned off when done running for the day.
If the carb begins to drip shortly after turning the gas valve on, the needle valve is not shutting off the gas when the bowl gets full.
Not to be confused with leaking a few drops following a failed start or immediately after shutting the engine off. That is normal. But it should not continue to drip, or black smoke and blubber at idle.
Once it is determined there truly is a flooding situation, here are the typical causes:
Trash under the needle valve. The most common cause. If the tank is contaminated with dirt and debris, or flaking rust, the problem will be ongoing until the tank is cleaned or replaced. Sometimes the needle valve can be flushed by closing the fuel valve and draining the carb (there is a drain plug in the bottom of the bowl), or running the engine until the carb is empty, then reopening the fuel valve.
The needle valve may be defective, the float partially sunk, the float level set too high, the needle seat is loose. Any of theses cases the carb will need to come apart and be repaired. Don't be intimidated by this, the carb is simple and designed to be field serviced. Plenty of how to videos, parts breakdowns, and specs online.
One other thing to check, sometimes when the gas was left on, or a carb is running rich, the engine oil can be contaminated with gas. Check the oil for overfull, feel and smell the oil for gas contamination. If it has been contaminated, it will need to be drained and replaced.
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