184 Cub Lo-Boy with the C60 engine, same as all cubs, has the zenith carb. When mowing, tractor runs great on level ground, but when pulling an incline while mowing, tractor soon falters and dies out. Inline fuel filter halfway between tank and carb usually runs about 1/2 full, now starts around 1/4 and then runs dry under load, leading to the choking out. Took filter out of line, still same problem. Take gas line loose from carb, full stream of fuel. Took the carb off, checked jets / needle valve / float, everything seems to be perfect (just rebuilt last fall). It's almost as if it's vapor locked, but heck I even tried it with the gas cap off. Stinkin' thing ran fine last week when I cut with it, get it out of the shed today and it does this junk right off... what is the deal?
- Thread starter IHMANKY
- Start date
Janicholson
Well-known Member
Water in the gas can plug up systems and look like modern fuel. Did you add gas to it?
Using an inline filter with gravity feed flow rates is really necessary if you desire to use a filter. They are available at NAPA, and are larger. The filter not filling indicates the stoppage may be between there and the tank pickup tube at the sediment bowl. One issue is the intermittent nature of the stoppage. I would run it up the hill, and when it quits, I would then look for the blockage. JimN
Using an inline filter with gravity feed flow rates is really necessary if you desire to use a filter. They are available at NAPA, and are larger. The filter not filling indicates the stoppage may be between there and the tank pickup tube at the sediment bowl. One issue is the intermittent nature of the stoppage. I would run it up the hill, and when it quits, I would then look for the blockage. JimN
That's what's baffling about all this fellas, I've checked the tank, both sitting and when it dies going uphill, nothing there. The pickup screen is clear and unblocked. The flow is good even then, when line is unhooked from carburetor. With inline filter in place, or out, the flow is still a full fuel line stream. It's not necessarily the uphill thing, if you load it good on flat ground or put it in road gear it will choke out after a few feet. Just doesn't make sense on any level.
rustyfarmall
Well-known Member
Viton tipped needle valves have been standard issue for at least 30 years now. The trick to prevent them from sticking is to thoroughly clean both the needle and the seat with aerosol carb cleaner BEFORE installing.
Janicholson
Well-known Member
With that info I will ad that a low float level, or a partially plugged main jet will do the same thing. JimN
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