Shooters,
I'm looking for some help and possible somebody out there that has experienced the same problem that I am having and will be able to help me out.
I have a very clean 2007 Artic Cat 500 4x4 that I got from a hide member. It ran great, had more power than I could imagine. I went down to Central W.V. this last weekend for some trail riding and I had engine issues the whole trip and now that I'm back in Ohio, the quad is still running like crap. Elevation only changed around 100 ft less, so that is not the issues.
Symptoms:
Around 50% to 100% throttle, while the quad has a load (either pulling something or climbing a hill) I have no power. It sputters, pops, and just sounds like a raped ape.
Low rpm and throttle, everything works as advertised. Anything past that, it runs like crap.
Here are the things I have checked or did.
1- Change spark plug
2- Changed battery, ensured full charge and did a load test.
3- Changed fuel
4- Checked air filter, checks good.
5- Pulled carb, inside it was super clean, no dirt, sand, debris, old gas or any kind of residue.
6- Checked all jets and needles for debris, checks good, all the correct jets are installed.
7- Float is not stuck or bent up.
8- Pulled the vacuum piston or rubber diaphragm. I WAS PRETTY SURE THERE WAS A HOLE IN THE RUBBER DIAPHRAGM, but was unable to locate it a second time.
My thoughts are there is a hole in the diaphragm and its causing the carb to not get enough fuel when the carb is calling for it. Does anybody know how these systems work and if this sounds like it could be the problem. I honestly cannot figure out what the issue is and I'm running out parts to change and things to try.
Attached is a photo of the vacuum piston/ diaphragm.
Any help is appreciated.
Mark
I'm looking for some help and possible somebody out there that has experienced the same problem that I am having and will be able to help me out.
I have a very clean 2007 Artic Cat 500 4x4 that I got from a hide member. It ran great, had more power than I could imagine. I went down to Central W.V. this last weekend for some trail riding and I had engine issues the whole trip and now that I'm back in Ohio, the quad is still running like crap. Elevation only changed around 100 ft less, so that is not the issues.
Symptoms:
Around 50% to 100% throttle, while the quad has a load (either pulling something or climbing a hill) I have no power. It sputters, pops, and just sounds like a raped ape.
Low rpm and throttle, everything works as advertised. Anything past that, it runs like crap.
Here are the things I have checked or did.
1- Change spark plug
2- Changed battery, ensured full charge and did a load test.
3- Changed fuel
4- Checked air filter, checks good.
5- Pulled carb, inside it was super clean, no dirt, sand, debris, old gas or any kind of residue.
6- Checked all jets and needles for debris, checks good, all the correct jets are installed.
7- Float is not stuck or bent up.
8- Pulled the vacuum piston or rubber diaphragm. I WAS PRETTY SURE THERE WAS A HOLE IN THE RUBBER DIAPHRAGM, but was unable to locate it a second time.
My thoughts are there is a hole in the diaphragm and its causing the carb to not get enough fuel when the carb is calling for it. Does anybody know how these systems work and if this sounds like it could be the problem. I honestly cannot figure out what the issue is and I'm running out parts to change and things to try.
Attached is a photo of the vacuum piston/ diaphragm.
Any help is appreciated.
Mark
