Re: frustrated with 8n

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Posted by Steve (Magnolia, TX) on March 17, 2006 at 08:50:13 [URL] :

In Reply to: frustrated with 8n posted by jeff z on March 13, 2006 at 20:15:50:

If you're having a fuel problem (which is where I'd start) try this...

Ensure that your 3 fuel filters are clear. Do this by removing the bowl drain from the bottom of your carburetor (make sure you've got a bucket handy to catch the gas) and open up the shut-off valve on your sediment bowl. It should run a steady stream. If it doesn't...
1. Remove the fuel cap from the gas tank. This will test your vent hole to ensure that a vacuum is not being created in the tank.
2. (Assuming #1 was to no avail) Check all 3 filters.
a) The first filter is a 'tube' type screen that is inside the fuel tank. The only way to check it is to unscrew the sediment bowl/shut-off valve assembly from the fuel tank. A lot of times this screen is either missing or badly deteriorated. You're wanting to ensure that there are no large flakes of rust (or other 'trash') caught up in the screen.
b) The second filter is a flat screen that is on top of the sediment bowl. To check it, remove the glass sediment bowl from the base (shut-off valve assembly) and visually inspect it. Again, you're looking for anything caught in the screen.
c) The third (and final) filter is just inside the carburetor. Follow your steel fuel line from the sediment bowl/shut-off valve assembly to where it enters the carburetor. You should be looking at a 90-degree, brass fitting. Remove the fuel line from the fitting, then the fitting from the carburetor body. Your final filter will be affixed to the brass fitting where it goes into the carburetor. It is another tubular screen.
d) Finally, if you've got any other inline filters in your fuel line (or if you've got a rubber fuel line, in place of the steel one) the general recommendation is to remove any extra filters (on the gravity feed system they can cause 'starvation') and replace the rubber line with a steel one (Derek at Just 8Ns carries these, along with the rubber bumper to protect it from rubbing on the underside of the gas tank).

Along the way, you might try disconnecting the air intake hose from the throat of the carburetor to ensure that you're getting good airflow, too... (if this is the remedy, remove and thoroughly clean your air cleaner and remember to replace the oil in the cup every 10 hours of use).

Good luck and keep us apprised of your success (well, I sure hope that it's success)

Steve

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