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 GTR losing rpms at WOT 
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MMT Pro Member

Joined: Tue Dec 13, 2011 2:21 pm
Posts: 75
Post GTR losing rpms at WOT
Motor wth mikuni carb and guttted exhaust... (all I know for sure bought it that way)... will run like scalded dog for about 3-4 minutes then lose rpms slowly... can let off and go again and runs good for 3-4 minutes then loses rpms again... new fuel pump last night and filter... still doing it... can cruise on plane and won’t act up... only at WOT... water in fuel? Sucking air from tank... boat is 1651 excel with outboard tank in the front... try to run straight gasoline in it as much as possible ...boat does sit between uses for approximately 2 weeks... any help would be appreciated thanks


Sun Jun 24, 2018 10:29 am
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Joined: Sun Aug 13, 2017 5:21 pm
Posts: 2
Post Re: GTR losing rpms at WOT
Is the vent open on the gas tank?


Sun Jun 24, 2018 2:35 pm
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MMT 1000 Club

Joined: Sat Sep 30, 2017 7:10 pm
Posts: 1872
Post Re: GTR losing rpms at WOT
I was about to ask the same question


Sun Jun 24, 2018 2:49 pm
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MMT Member

Joined: Sun Feb 01, 2009 9:19 am
Posts: 5
Post Re: GTR losing rpms at WOT
Have usimiller problem, 36 Gd, surges , pops thru carb,13 Volts at carbaroter


Sun Jul 15, 2018 9:43 am
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MMT 1000 Club

Joined: Sun Oct 24, 2010 7:19 pm
Posts: 1103
Post Re: GTR losing rpms at WOT
Check your fuel line. The marine line is bad about the inner liner separating and restricting the flow.


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Sun Jul 15, 2018 6:05 pm
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MMT 1000 Club

Joined: Mon Dec 31, 2012 11:07 pm
Posts: 4820
Location: West Monroe, LA
Post Re: GTR losing rpms at WOT
Float needs adjusting in carb, air leak in the fuel line somewhere, issue with fuel line, fuel tank not vented well enough (loosen the cap next time you run it and see if that's it)

#CFFITR
#TheGhostBoat
#whoneedsphysicsihaveamudmotor


Sun Jul 15, 2018 6:16 pm
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