Thank you for this Video. I have a 98' QuadRunner sitting in my yard for 2 years now, and I'm nearly positive this is the issue. Time to get to work. Thanks again.
All Balls Racing sells a rebuild kit for the vacuum actuated fuel petcocks for around $26 on amazon. I had to put a kit in a 05 Vinson a couple weeks ago. Once the diaphragm goes bad it will either let fuel run through the vacuum line and flood the engine or the plunger inside of the valve will not open because the diaphragm is rock hard.
Boy I got a good laugh when you lifted that seat lol. I ended up getting an aftermarket carb. Not all parts fit right but I was able to adapt it to fit with the right sized drill bit. There was a hose that was too big for the fuel inlet port. Made an adjustment in the idle screw and it’s been running better then it ever has been
Currently trying to get my Honda 300 up and running again, replaced the Carburetor with Honda OEM , and after installing it, ran really good, just idled high, so I went to adjust the throttle adjustment screw, no change, so I didn’t want to touch the pilot screw, yet so I went back in and readjusted the throttle cable, and adjustment screw, so it would. Could not get it to start after, and haven’t figured it out yet.
I have a 99 fourtrax and love it...super reliable....what was yours doing or not doing with the old carb...just a crank no start issue ?.....id probably check and make sure It wasn't sucking in air at the gasket where it connects at the cylinder head...start it up and take some brake cleaner and spray around the seal...you will know real quick if it's leaking....hope this helps.... thanks for watching!
@@straightcutgeerz I just fixed it today, I thank the Lord. I just took the new carb back out, drained it , let the engine air out, inspected it to make sure it wasn’t flooded, and it wasn’t. Took carb, completely drained it, and took a air hose, and blew it out good. I let the machine air out, and the carb, then carefully reconnected everything back up. Made sure all my hoses were snug, and tight , carefully made my throttle cable adjustments, and hooked back up all the fuel lines, the the fuel on , waited a moment, pushed the primer pump just twice, then kickstarted it, before I could not get it to kickstart. Only took a couple tries, and it started running, was idling a little high, but I adjusted the throttle adjustment screw, and got it down to about normal. I may do some more, fine tuning, but it’s back up and running. I still have to find out what my electric start issue is, but I know the stator isn’t bad
Technically if everything else is operating properly and the petcock is not shutting fuel flow off then you shouldn't really notice a problem...if you are getting fuel in the crankcase then you may want to check the float valve and seat, sounds like that valve is not sealing off which should stop fuel from entering the carburetor.....if the petcock is messed up it could be flowing fuel to the carb when it shouldn't be or the petcock is on the wrong setting but still the float valve should stop it once the carb bowl is full...
Reserve should still function as intended...you may want to test before you head out on a big trip though ....just to make sure..but I do believe it should work...
With the ports capped alone I still had issues with poor fuel delivery to the carb...once I removed the o-ring and spring inside the petcock is when my problem went away...as far as position of the fuel petcock (after the o-ring/spring removal) it would work in the "on" "res" or "pri" position with no issues that I could tell, but remember with the petcock internals taken out there is no "off" position. Fuel will flow through the petcock regardless of position and if there is a leak anywhere it will drain until the fuel tank is empty
New one $40 online. BUY SAME REMAKE. DONG BUG CHEEP $10 OFF BRAND. WILL RUN ROUGH. AND IF YOU EVER HAVE A. POP NOISE WHEN YOU HIT THE GAS. COUPD BE Ignition. Or Electro rectifier.
![BLACK BAG - Official Trailer [HD] - Only in Theaters March 14](http://i.ytimg.com/vi/Du0Xp8WX_7I/mqdefault.jpg)
Thank you for this Video. I have a 98' QuadRunner sitting in my yard for 2 years now, and I'm nearly positive this is the issue. Time to get to work. Thanks again.
Glad to help...hope you get it going....thanks!!
Best vid on this issue ive seen. Love the diagrams
Thanks!!!....glad it helped!!!!
Had the same issue with an Eiger 400 and replaced the petcocks on both of my Eigers when I found out about it.
All Balls Racing sells a rebuild kit for the vacuum actuated fuel petcocks for around $26 on amazon. I had to put a kit in a 05 Vinson a couple weeks ago. Once the diaphragm goes bad it will either let fuel run through the vacuum line and flood the engine or the plunger inside of the valve will not open because the diaphragm is rock hard.
Boy I got a good laugh when you lifted that seat lol. I ended up getting an aftermarket carb. Not all parts fit right but I was able to adapt it to fit with the right sized drill bit. There was a hose that was too big for the fuel inlet port. Made an adjustment in the idle screw and it’s been running better then it ever has been
😂..that's great...thanks for watching.....
Currently trying to get my Honda 300 up and running again, replaced the Carburetor with Honda OEM , and after installing it, ran really good, just idled high, so I went to adjust the throttle adjustment screw, no change, so I didn’t want to touch the pilot screw, yet so I went back in and readjusted the throttle cable, and adjustment screw, so it would. Could not get it to start after, and haven’t figured it out yet.
I have a 99 fourtrax and love it...super reliable....what was yours doing or not doing with the old carb...just a crank no start issue ?.....id probably check and make sure It wasn't sucking in air at the gasket where it connects at the cylinder head...start it up and take some brake cleaner and spray around the seal...you will know real quick if it's leaking....hope this helps.... thanks for watching!
@@straightcutgeerz I just fixed it today, I thank the Lord. I just took the new carb back out, drained it , let the engine air out, inspected it to make sure it wasn’t flooded, and it wasn’t. Took carb, completely drained it, and took a air hose, and blew it out good. I let the machine air out, and the carb, then carefully reconnected everything back up. Made sure all my hoses were snug, and tight , carefully made my throttle cable adjustments, and hooked back up all the fuel lines, the the fuel on , waited a moment, pushed the primer pump just twice, then kickstarted it, before I could not get it to kickstart. Only took a couple tries, and it started running, was idling a little high, but I adjusted the throttle adjustment screw, and got it down to about normal. I may do some more, fine tuning, but it’s back up and running. I still have to find out what my electric start issue is, but I know the stator isn’t bad
Can the petcock flood the engine crankcase? Mine is filling up with gas some how.
Technically if everything else is operating properly and the petcock is not shutting fuel flow off then you shouldn't really notice a problem...if you are getting fuel in the crankcase then you may want to check the float valve and seat, sounds like that valve is not sealing off which should stop fuel from entering the carburetor.....if the petcock is messed up it could be flowing fuel to the carb when it shouldn't be or the petcock is on the wrong setting but still the float valve should stop it once the carb bowl is full...
The mouse in the quad was funny lol
😂😂...I thought so as well
Same problem on my 2000 quadmaster so i just bought an almost identical one off amazon..problem fixed.petcock that is.
Great!!...glad you got it back up and running
So when modifying the petcock this way, do you lose functionality of the “reserve”?
Reserve should still function as intended...you may want to test before you head out on a big trip though ....just to make sure..but I do believe it should work...
Question, Having start issue and when you plug the Vacuum Ports to you leave the fuel select in prime or is it in the full on.
With the ports capped alone I still had issues with poor fuel delivery to the carb...once I removed the o-ring and spring inside the petcock is when my problem went away...as far as position of the fuel petcock (after the o-ring/spring removal) it would work in the "on" "res" or "pri" position with no issues that I could tell, but remember with the petcock internals taken out there is no "off" position. Fuel will flow through the petcock regardless of position and if there is a leak anywhere it will drain until the fuel tank is empty
Looks like it could pull fuel thru valve diagram is bad thru vacuum port and flood it😊
Exactly!..
Thanks I know what I need to know now the pri is junk and I’ll work around it
I agree they do not work well.....thanks!!
That’s crazy you don’t work on quads regular and you go to pull this one apart and you find a live one!
I was not expecting that as well.....lol
I’m thinking they put 🔥 out with water hose and sold it 😢
I'm thinking your probably correct...😂
I would bypass it and put a lawnmower fuel cut off valve on it😊
That's a great idea.....as far as I know he is still using it...so having a valve to shut fuel off would be best...
Ditch that pet cock and replace with a gravity feed Yamaha one.
New one $40 online. BUY SAME REMAKE. DONG BUG CHEEP $10 OFF BRAND. WILL RUN ROUGH. AND IF YOU EVER HAVE A. POP NOISE WHEN YOU HIT THE GAS. COUPD BE Ignition. Or Electro rectifier.