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bluemadness14
MMT Member
Joined: Tue Jul 29, 2014 6:22 am
Posts: 31
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 Mikuni carb I have a 35 hp mud buddy with heads cam exhaust. Just added the mikuni and it runs great sitting in the driveway. When I take it to the water is runs awesome for about 3 minutes. Then screws up. It runs fine from 1/4 throttle to wot but from idle if I give it throttle it stumbles a couple seconds and then goes. Also when I shut it off its hard to get back started. Anyone have any idea what this could be?
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| Wed May 25, 2016 12:40 pm |
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flint87
MMT 1000 Club
Joined: Sun Dec 14, 2014 2:21 pm
Posts: 3214
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Re: Mikuni carb Sounds like fuel delivery but there's a million things to check. What jetting are you running?
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| Wed May 25, 2016 4:29 pm |
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bluemadness14
MMT Member
Joined: Tue Jul 29, 2014 6:22 am
Posts: 31
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Re: Mikuni carb I ordered it from the boat dr. I'm thinking he said 165 and 20
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| Wed May 25, 2016 5:18 pm |
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flint87
MMT 1000 Club
Joined: Sun Dec 14, 2014 2:21 pm
Posts: 3214
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Re: Mikuni carb
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| Wed May 25, 2016 5:54 pm |
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bluemadness14
MMT Member
Joined: Tue Jul 29, 2014 6:22 am
Posts: 31
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Re: Mikuni carb The tank vent is open and I jus replaced the fuel lines. I am running a fuel water separator. I'm not sure if that matters and it is a vacuum pump
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| Wed Jun 01, 2016 5:05 am |
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MaXXis85
MMT Elite Member
Joined: Wed Jan 14, 2009 7:23 am
Posts: 6233
Location: Tarkington, TX
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Re: Mikuni carb I would adjust the ACC pump to barely any gap, then make sure it is spraying on the jet needle. Needle nose pliers can coax it back into positon.
_________________
Bayou Surface Drive
337-351-0362
Tarkington, TX 77327
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| Wed Jun 01, 2016 6:55 am |
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flint87
MMT 1000 Club
Joined: Sun Dec 14, 2014 2:21 pm
Posts: 3214
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Re: Mikuni carb Not to hijack but is there any problem with the gap being too closed? Mine is spraying fuel into the slide for a split second as soon as I hit the throttle
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| Wed Jun 01, 2016 11:30 am |
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krazo
MMT Addict
Joined: Thu Sep 06, 2012 8:44 pm
Posts: 667
Location: SE Bama
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Re: Mikuni carb If the a/f isn't set right it could cause this too. Did you read the manual and set everything before you run the motor?
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1754 prodigy- stage 2 GTR
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| Wed Jun 01, 2016 1:10 pm |
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bluemadness14
MMT Member
Joined: Tue Jul 29, 2014 6:22 am
Posts: 31
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Re: Mikuni carb Yes I set everything like the manual said. Also called the boat dr and he said make sure the acc pump is spraying in the right spot and it's also good
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| Wed Jun 01, 2016 2:00 pm |
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cb5331
MMT Super Elite Member
Joined: Fri Dec 18, 2009 8:10 pm
Posts: 16915
Location: Rowlett, TX
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Re: Mikuni carb
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| Wed Jun 01, 2016 2:03 pm |
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bluemadness14
MMT Member
Joined: Tue Jul 29, 2014 6:22 am
Posts: 31
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Re: Mikuni carb Does the acc pump need to be hitting the needle when it sprays or just going by it
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| Wed Jun 01, 2016 3:56 pm |
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flint87
MMT 1000 Club
Joined: Sun Dec 14, 2014 2:21 pm
Posts: 3214
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Re: Mikuni carb
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| Wed Jun 01, 2016 4:23 pm |
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bluemadness14
MMT Member
Joined: Tue Jul 29, 2014 6:22 am
Posts: 31
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Re: Mikuni carb Does anyone know what I should adjust my valves to? I have cam heads exhaust and mikuni
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| Thu Jun 02, 2016 7:20 pm |
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Russ
MMT 1000 Club
Joined: Mon Dec 31, 2012 11:07 pm
Posts: 4820
Location: West Monroe, LA
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Re: Mikuni carb Ask the person/company that sold you the cam. Also, you could read the 7000 posts on the subject on this forum. There's a discussion that's been happening the last week or two concerning that very thing.
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| Thu Jun 02, 2016 8:03 pm |
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MaXXis85
MMT Elite Member
Joined: Wed Jan 14, 2009 7:23 am
Posts: 6233
Location: Tarkington, TX
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Re: Mikuni carb Acc pump has to hit the jet needled to splatter the fuel to help atomize it.
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Bayou Surface Drive
337-351-0362
Tarkington, TX 77327
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| Fri Jun 03, 2016 5:46 am |
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