Hello. This is a neat little forum and every thread I see has replies with reasonable answers, so I signed up in hopes of getting to the bottom of my 300 king quad problems I was using another forum, but it seems I'm the only guy answering questions over there lol. Anyway, I'm having trouble similar to the OP. It just seems the carb isn't getting enough gas.
Thanks to oxidized_black, I was able to get the service manual and I set the float just over .5 inch (It was way high). I noticed when I pressed on the float, before it used up the spring inside the needle, the float would hit the carb body. That didn't seem right to me so I left it at that setting without going fully to .5 inches as the spec said. I've also installed a 40 pilot jet in place of the 37.5. I've installed a 140 main in place of the 120 something. Needle clip is per spec at 4 clip from top. All these specs seem odd to me. Usually carbs are set at 3rd clip (middle one) and mixture screw is 1.5 turns out instead of 2 5/8 like the spec says.
So even with all this richening, I'm still having to use the choke to idle and oddly enough, I'm having to use it more the hotter the engine gets! Which is making me think its something electrical. Only electrical things crap out with heat. But what could it be? And sometimes it will rev out nicely. Then I head for the road to see how fast it will go and it acts like the road scares it LOL! It acts like its out of gas. So I limp back to the yard fearing I'll be stranded on the road and it runs good again as soon as it hits grass. I'm baffled.
I had the petcock problem everyone else had and I bypassed that. I took the fuel pump apart and polished the corrosion off. There's no reason the pump shouldn't be working right.
Valves are set right, but engine is full of gas due to the petcock problem. Its not insanely full, but it is overfull. I've read this can cause problems, but its hard for me to imagine it would cause an engine to run lean. I don't want to drain it and refill because as soon as I get it running right, I'm tearing the engine apart. IE I don't want to waste 4qts of oil. Unless someone really really thinks it could cause big problems. I don't want to break in a new engine with carb problems.
Suzuki King Quad 300 Running Problems
in Suzuki ATV Forum
Posted
Hello. This is a neat little forum and every thread I see has replies with reasonable answers, so I signed up in hopes of getting to the bottom of my 300 king quad problems
I was using another forum, but it seems I'm the only guy answering questions over there lol. Anyway, I'm having trouble similar to the OP. It just seems the carb isn't getting enough gas.
Thanks to oxidized_black, I was able to get the service manual and I set the float just over .5 inch (It was way high). I noticed when I pressed on the float, before it used up the spring inside the needle, the float would hit the carb body. That didn't seem right to me so I left it at that setting without going fully to .5 inches as the spec said. I've also installed a 40 pilot jet in place of the 37.5. I've installed a 140 main in place of the 120 something. Needle clip is per spec at 4 clip from top. All these specs seem odd to me. Usually carbs are set at 3rd clip (middle one) and mixture screw is 1.5 turns out instead of 2 5/8 like the spec says.
So even with all this richening, I'm still having to use the choke to idle and oddly enough, I'm having to use it more the hotter the engine gets! Which is making me think its something electrical. Only electrical things crap out with heat. But what could it be? And sometimes it will rev out nicely. Then I head for the road to see how fast it will go and it acts like the road scares it LOL! It acts like its out of gas. So I limp back to the yard fearing I'll be stranded on the road and it runs good again as soon as it hits grass. I'm baffled.
I had the petcock problem everyone else had and I bypassed that. I took the fuel pump apart and polished the corrosion off. There's no reason the pump shouldn't be working right.
Valves are set right, but engine is full of gas due to the petcock problem. Its not insanely full, but it is overfull. I've read this can cause problems, but its hard for me to imagine it would cause an engine to run lean. I don't want to drain it and refill because as soon as I get it running right, I'm tearing the engine apart. IE I don't want to waste 4qts of oil. Unless someone really really thinks it could cause big problems. I don't want to break in a new engine with carb problems.
Thoughts?