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[ 8 posts ] |
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Mikuni vacuum... running lean?s
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koonce727
MMT Pro Member
Joined: Sat Dec 04, 2010 7:19 pm Posts: 106 Location: Mergens Point, WI
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 Mikuni vacuum... running lean?s
This is a new to me rig so I do not know everything about the set-up. I have about 35hrs on the set-up personally. I noticed white powered on my exhaust tip, turned the motor on and when you get on the throttle you get the classic white smoke. I tryed adjusting the fuel screw and idle but this did not help so i adjusted things back to where they were.
I then noticed when standing in the boat facing the carb that there is a vacuum tube with a rubber cover on the end, the rubber cover is half torn? When I plug it off my idle goes down, and idles just fine, or so it seems, then when you let go(unplug it), the rpms jump up about 400.
I am assuming this may be the cause of my lean issue with the vacuum sucking more air in, but at the same time not sure. Do you guys usually run this vacuum open, or close it off?
Heres a picture of what im talking about.
_________________ Burlap Brothers
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Wed Jun 27, 2012 4:29 pm |
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50fps
MMT 1000 Club
Joined: Tue Jan 13, 2009 6:42 pm Posts: 2377 Location: West Coast Wisconsin
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 Re: Mikuni vacuum... running lean?s
Cap it off.
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Wed Jun 27, 2012 4:38 pm |
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BoatDR
MMT Sponsor
Joined: Tue May 24, 2011 6:43 am Posts: 1604
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 Re: Mikuni vacuum... running lean?s
Yes it must be capped.
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Wed Jun 27, 2012 4:41 pm |
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OwenDickeson
MMT Elite Member
Joined: Wed Mar 11, 2009 12:45 pm Posts: 9869
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 Mikuni vacuum... running lean?s
Hmmm... Mine kinda looks like that. lol
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Wed Jun 27, 2012 4:43 pm |
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koonce727
MMT Pro Member
Joined: Sat Dec 04, 2010 7:19 pm Posts: 106 Location: Mergens Point, WI
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 Re: Mikuni vacuum... running lean?s
thanks fellas. Ill be sure to get it capped off.
_________________ Burlap Brothers
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Wed Jun 27, 2012 4:44 pm |
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Dirt17
MMT Member
Joined: Wed Jun 06, 2012 6:19 pm Posts: 12
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 Re: Mikuni vacuum... running lean?s
do you do good on the geese hunting that close to a swing set??
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Wed Jun 27, 2012 4:48 pm |
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koonce727
MMT Pro Member
Joined: Sat Dec 04, 2010 7:19 pm Posts: 106 Location: Mergens Point, WI
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 Re: Mikuni vacuum... running lean?s
Only when Foiles is in town......
_________________ Burlap Brothers
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Wed Jun 27, 2012 5:09 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 vacuum... running lean?s
^nice 
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Wed Jun 27, 2012 5:23 pm |
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