Posted by rrlund on May 20, 2018 at 13:12:34 from (69.36.53.86):
I thought I'd post this just FYI. I'd been having fits with two different carbs on my Yamaha 225 Moto 4,so I finally threw in the towel this spring and bought a new carb off Amazon. That one was no better. The float was sticking right out of the box and I'd have to shut off the gas as soon as I shut off the engine. It ran rough as a cob too. I took it apart and blew everything out. That fixed the flooding problem,but it still didn't have any power. I couldn't run it more than half throttle or it would cut out,backfire,spit and sputter. Going uphill I'd be right down in first gear nursing it along.
I noticed that on rough ground it would do it even at low RPMs. It started to dawn on me that maybe the float wasn't dropping low enough and was hitting the bottom of the bowl before it even let much gas in. I just took the bowl off,took a pair of needle nose pliers and bent the floats up just ever so slight. I put it back together,rode it out to tag a calf and down to see if some corn had sprouted. It runs perfect. Apparently it just wasn't getting enough gas in the bowl.
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Today's Featured Article - Tuning-Up Your Tractor: Secondary Ignition Wires and Distributor - by Curtis Von Fange. In our last episode we spent the entire day checking out the spark plugs. Is that efficency? Actually, it took more time to explain than it really did to do the inspection. At any rate we decided that a compression test was in order so we could verify the internal engine status. That way we wouldn't buy any tune up parts until we were sure that the engine was in reasonable mechanical condition. Our tests showed a fictional compression reading of 85, 80, 82 and 86 psi. That is well within a
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