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Suzuki ATVs open forum - I can not get my 4 wheeler to start.

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I can not get my 4 wheeler to start.
by: Gary   on: Friday, April 9 2010 at 11:06:16 EDT

I know it is getting fire. I pulled the plug and plugged in the wire and turned the engine. I g..


by: Gary   on: Friday, April 9 2010 at 11:09:05 CDT

I know it is getting fire. I pulled the plug and plugged in the wire and turned the engine. I got an arc when I put the plug close to the frame.
I know I have gas. I took apart the carburator and cleaned all the parts and put it back together, but it won't start. I have changed oil, replaced the oil filter and air filter. The plug is new as well. Any suggestions?
new plugs, cleaned carburater, checked to make sure I have fire from the plug, changed oil, replaced oil and air filter.


by: Sam   on: Friday, April 9 2010 at 14:03:23 CDT

Good Afternoon, First thing I recommend trying before we get to far, is take some starting fluid, remove the intake track or air filter, spray a small amount into carb while cranking engine and see if it will start for a moment.
If it does then we can assume that you have a fuel problem which we can address. If it does nothing then we can look further into engine compression, valve clearance, ect. If the compression is low the engine will not start, and if you have a tight valve it usually will not start either. So try the first test and then we can move on from there.


by: Gary   on: Saturday, April 10 2010 at 12:46:11 CDT

tried spraying starting fluid into carb. Did not even try to start.
I also pulled the plug and put my thumb over hole and felt compression. What next?


by: Sam   on: Saturday, April 10 2010 at 17:22:00 CDT

Gary, Ok so now we need to determine whats missing, We can say you have good spark correct? (Bright strong blue spark) We can aslo assume its not a fuel issue, so that leaves us with the engine, doing a finger compression test might make it seem like it has comprssion but not knowing what the exact # of psi the top end is producing we don't know if it could be a ring/piston issue. We also need to make sure the valve train is working properly, we need to make sure none of the valves are bent, broken valve faces, broken springs and they need to be adjusted in case they are tight causing a no start condition. Now we can adjust the valves but the only way to know if there are any major issues with the valves is a Leakdown test that needs to be performed to make sure. Sometimes but not always a shop in your area may let you rent or borrow a compression tester and leakdown tester. If not you may have to have someone do it for you. Or purchase some. I realize thats not what you want to hear but without the proper diagnoisis tools its hard to pinpoint what issue we are having. I can guide you threw the valve adjustment and all the other diagnosis if you get the tools. You might even just try doing the valve adjustment first and that way you can sort of watch the valve train operating.
Maybe it could be just a tight valve?


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