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ChessBay
MMT Member
Joined: Wed Aug 31, 2011 9:25 am
Posts: 9
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 Help with longtail It is a Honda 20hp electric start. It starts right up and idles fine, can run up the rpm's no problem until the prop goes in the water. Once the prop goes in the water the power dies and sputtering starts, if you lift the prop back out of the water it starts running fine again with no sputtering or loss of rpms. I thought at first it was just bad gas so I changed that and made sure the jets weren't clogged, the problem is still there.
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| Mon Feb 20, 2012 9:27 am |
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PaleoHuntr
MMT 1000 Club
Joined: Mon Feb 21, 2011 5:21 pm
Posts: 1800
Location: Idaho Falls, ID
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Re: Help with longtail Do you have a primer bulb? Does it stay hard and full of fuel when the engine sputters? Check for air leaks in your fuel lines and connections.
_________________
1976 16X48 Lowe powered by a 25hp MB LT and dino turds
To have really lived, you must have almost died. To those who have fought for it, freedom has a flavor the protected will never know.
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| Mon Feb 20, 2012 11:59 am |
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SwampDonkey1
MMT F.E.
Joined: Tue Mar 08, 2011 10:09 pm
Posts: 923
Location: North Central KS
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Re: Help with longtail Is the sputtering at idle speed or WOT? Idle speed is easy to adjust, Im pretty sure my idle speed is right around 1400 RPM. What size prop/model of longtail?
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1436 Lowe
-Workin for the man, Huntin when I can...-
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| Mon Feb 20, 2012 12:04 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: Help with longtail Remove the plunger on the fuel solenoid or plug the hole with a bolt. See if that fixes it.
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| Mon Feb 20, 2012 12:06 pm |
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ChessBay
MMT Member
Joined: Wed Aug 31, 2011 9:25 am
Posts: 9
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Re: Help with longtail Bulb stays full the whole time, it only starts sputtering when the prop is in the water and I give it gas. Idles fine in and out the water and will max rpm out of water but not in water.
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| Mon Feb 20, 2012 4:44 pm |
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indawoods
MMT Pro Member
Joined: Fri Sep 23, 2011 3:32 am
Posts: 287
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Re: Help with longtail change fuel (no water) and clean carb. if the carb is fine, and you are POSITIVE you have no air leaks, change your fuel line. some of them have a membrane that can separate from the sheath and collapse on the inside, sealing the hose. you can go round and round chasing it down.
Also make sure you've got spark on both sides. then check compression.
if all this checks out, look for corrosion or rats chewing wires.
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| Mon Feb 20, 2012 7:01 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: Help with longtail
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| Mon Feb 20, 2012 7:04 pm |
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bobbyjober
MMT Addict
Joined: Sun Aug 08, 2010 3:28 pm
Posts: 546
Location: St. Martinville, La
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Re: Help with longtail CB is right. My 24 honda did that when it had just 20 hours. Ethanol gas causes plunger to rust up and not move to let enough gas through it. I run stabil marine formula in my gas and it works. Clean plunger and housing with carb cleaner, re-install, should be fine.
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1542 FLATBOTTOM WITH 24 HONDA MUD BUDDY MINI TURNING A 12" GDSD PROP/17 FT XPRESS CENTER CONSOLE WITH 90 MARINER
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| Mon Feb 20, 2012 7:17 pm |
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TimberGHOST
MMT Pro Member
Joined: Mon Feb 06, 2012 5:50 am
Posts: 58
Location: Douglas, Ga
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Re: Help with longtail what size prop and boat r u running? With my 15 hp lifan homebuilt i have to give it a little extra throttle right before i give it the plunge just cause it wants to bog down and die it its only on idle.
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Quacker Stackin'
1436 Alumacraft / 15 hp longtail homebuilt... For now
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| Mon Feb 20, 2012 7:19 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: Help with longtail
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| Mon Feb 20, 2012 7:21 pm |
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spud69
MMT Member
Joined: Tue Feb 07, 2012 12:27 pm
Posts: 8
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Re: Help with longtail Had the same issue on a new motor turn
ed out to be my oil switch on the side of the motor. All i did was bypassed the switch and iy was go to go.
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| Mon Feb 20, 2012 7:26 pm |
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marsh maniac
MMT Pro Member
Joined: Thu Apr 02, 2009 1:50 pm
Posts: 156
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Re: Help with longtail Sputtering like fuel issue? Or missing like loss of spark?
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| Mon Feb 20, 2012 11:43 pm |
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Buzz Killington
MMT 1000 Club
Joined: Tue Jan 10, 2012 12:33 pm
Posts: 2455
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Help with longtail
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| Tue Feb 21, 2012 6:24 am |
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moduck
MMT Member
Joined: Wed Nov 18, 2009 7:24 am
Posts: 4
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Re: Help with longtail You might check the spark plug gap. Took out a brand new 7hp longtail and did the same thing. Turned out the spark plug gap was not set correct from factory or spark manufacuturer messed up.
Good luck.
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| Tue Jul 17, 2012 7:32 pm |
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