Posted by The Famous Grouse on December 22, 2018 at 07:37:56 from (97.116.27.81):
In Reply to: Petrol problems... posted by valiant farmer on December 22, 2018 at 01:09:33:
G'day. My wife is one of you Kiwi's. Grew up in Christchurch. Family was from the Gore area, spent a little time down there 3 years ago, love S' Otago area.
I had a very similar problem with my petrol Deere just last summer. Would die when under heavy loads or when "revving" on a downhill. Applying choke would bring her back to life .
To me the choke is the key here. Almost certainly a fuel restriction issue. Somewhere you have a chunk of rust or other crap hung up in the fuel line.
First off, if you have a drain screw on the bottom of the float bowl, do as suggested and run a flow test. Use a watch to time the flow for a minute so you have a baseline to see if you improved anything later on. When I finally did this on my Deere, it just a weak dribbling stream and I only got about a half litre a minute. The dribbling or turbulence is also a clue. If fuel system is not restricted it should give a nice even, smooth flow.
I made the mistake of trying to take shortcuts and guess where the restriction was. Don't do it. Take the whole piping apart, every fitting, etc. Find all "catch points" and don't stop until you've chased the whole line from the carb to the tank.
In my case, my Deere had been "farmerized" and converted (or is it perverted?) to a rubber fuel hose rather than the original metal fuel lines. I ended up finding multiple chunks of broken-down rubber hose and tank junk lodged in the intake from the tank, and the worst was the fuel shutoff valve was just full of junk.
I replaced all hose and fittings including the valve, cleaned the tank as best I could, put her back together and the flow improved by over 4X the original flow. Which is why you want to time the flow when you initially test it.
Fired 'er up and she ran like a champ.
BTW, I also added one of those nifty see-through inline filters and those are REALLY handy. It is now obvious that I still have some junk in the tank that I did not clean out, but for the price of these little inline Fram filters, I just keep changing them when I start to see too much grit inside. Really nice to be able to visually inspect this filter every time I check the oil and I feel like I'm heading off problems by just changing it out before it's really full of junk.
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