It is currently Thu Mar 28, 2024 11:23 am




Reply to topic  [ 20 posts ] 
 Motor runs great til it goes in the water! Video included 
Author Message
MMT Member

Joined: Wed Aug 30, 2017 8:07 pm
Posts: 16
Post Motor runs great til it goes in the water! Video included
Just a little background...

It started doing this out of the blue a couple weeks ago. Took out carb and cleaned it good and it's still doing it.

Just put a new fuel pump and spark plugs in and still having issues. Just won't push a load!

https://www.youtube.com/watch?v=ebIKITA7AmI

What do yall think?


Thu Dec 14, 2017 7:42 pm
Profile
MMT Elite Member
User avatar

Joined: Tue Jan 13, 2009 7:19 pm
Posts: 6441
Location: Trinity Bay - Texas
Post Re: Motor runs great til it goes in the water! Video include
May only be running on one cylinder...

On trailer pull one plug wire at a time while running...

_________________
Eat - Sleep - Hunt ! ! !

"It is good to have an end to journey toward; but
it is the journey that matters, in the end."


Thu Dec 14, 2017 9:18 pm
Profile
MMT Sponsor

Joined: Fri Jan 10, 2014 1:16 pm
Posts: 2107
Location: Gladewater TX
Post Re: Motor runs great til it goes in the water! Video include
Definately have 1 cylinder down.


Thu Dec 14, 2017 10:32 pm
Profile
MMT 1000 Club
User avatar

Joined: Thu Nov 04, 2010 7:38 am
Posts: 4323
Location: Cut Off, La.
Post Re: Motor runs great til it goes in the water! Video include

_________________
Refurbishing a Prodrive


Fri Dec 15, 2017 5:59 am
Profile
MMT F.E.
User avatar

Joined: Tue Aug 26, 2014 10:36 am
Posts: 822
Location: Jefferson TX
Post Re: Motor runs great til it goes in the water! Video include
Mine did the 1 cyl. thing it turned out to be the spark plug boot jumping fire to ground. Found it by starting it in the dark and saw the light :lol: new ngk boots problem solved!

_________________
SEAARK FX 2472 CC Merc 150HP 4Stroke(CypressCadillac)
Uncle J Custom - 19x54 CC Skiff w/40XD GTR


Fri Dec 15, 2017 8:52 am
Profile
MMT Member

Joined: Wed Aug 30, 2017 8:07 pm
Posts: 16
Post Re: Motor runs great til it goes in the water! Video include
Also, I checked the plugs since I put new ones in and the left one was pretty fouled and the right was looked good. Also I ran a compression test for what it's worth and the right one read 120 and the left one read 90.


Fri Dec 15, 2017 11:28 am
Profile
MMT 1000 Club

Joined: Mon Dec 31, 2012 11:07 pm
Posts: 4820
Location: West Monroe, LA
Post Re: Motor runs great til it goes in the water! Video include
hold the throttle wide open on the compression test

#CFFITR
#TheGhostBoat
#whoneedsphysicsihaveamudmotor


Fri Dec 15, 2017 11:49 am
Profile
MMT Member

Joined: Wed Aug 30, 2017 8:07 pm
Posts: 16
Post Re: Motor runs great til it goes in the water! Video include
Any idea as to what might need to be replaced? Spark plug is wet and exhaust isn't hot on that side.


Fri Dec 15, 2017 12:41 pm
Profile
MMT 1000 Club

Joined: Mon Dec 31, 2012 11:07 pm
Posts: 4820
Location: West Monroe, LA
Post Re: Motor runs great til it goes in the water! Video include
bad coil, plug wire jacked up, bad plug. still, you need to do the compression test correctly to get real compression numbers.

#CFFITR
#TheGhostBoat
#whoneedsphysicsihaveamudmotor


Fri Dec 15, 2017 12:46 pm
Profile
MMT 1000 Club
User avatar

Joined: Thu Nov 04, 2010 7:38 am
Posts: 4323
Location: Cut Off, La.
Post Re: Motor runs great til it goes in the water! Video include
Dirty jet on that side of the carb.
I know you said you pulled the carb and cleaned it, but did you pull out the main jets and clean them very well?

I'm still trying to troubleshoot the same issue with my motor.

_________________
Refurbishing a Prodrive


Fri Dec 15, 2017 12:52 pm
Profile
MMT Member

Joined: Wed Aug 30, 2017 8:07 pm
Posts: 16
Post Re: Motor runs great til it goes in the water! Video include
I am not sure if I cleaned the main jet. I took it apart and put it back together and cleaned in every little orifice, though. I very well might have but don't know for sure. What does the main jet actually look like?


Fri Dec 15, 2017 12:56 pm
Profile
MMT Member

Joined: Wed Aug 30, 2017 8:07 pm
Posts: 16
Post Re: Motor runs great til it goes in the water! Video include


Fri Dec 15, 2017 1:00 pm
Profile
MMT 1000 Club
User avatar

Joined: Thu Nov 04, 2010 7:38 am
Posts: 4323
Location: Cut Off, La.
Post Re: Motor runs great til it goes in the water! Video include
You have 2 jets on the carb.
1 for each cylinder.
You can use a flathead screw driver to take them out, and blow compressed ait through it to clear it of anything that may be stuck in the jets.
Make sure you remember which jets goes in which side of the carb.
Not hard at all.

_________________
Refurbishing a Prodrive


Fri Dec 15, 2017 1:13 pm
Profile
MMT Member

Joined: Wed Aug 30, 2017 8:07 pm
Posts: 16
Post Re: Motor runs great til it goes in the water! Video include


Fri Dec 15, 2017 1:14 pm
Profile
MMT Member

Joined: Wed Aug 30, 2017 8:07 pm
Posts: 16
Post Re: Motor runs great til it goes in the water! Video include
Bryce, I was able to clean up the those main jets so now i've got power on both cylinders. Thanks for the help!


Fri Dec 15, 2017 5:12 pm
Profile
MMT 1000 Club
User avatar

Joined: Thu Nov 04, 2010 7:38 am
Posts: 4323
Location: Cut Off, La.
Post Re: Motor runs great til it goes in the water! Video include

_________________
Refurbishing a Prodrive


Fri Dec 15, 2017 5:20 pm
Profile
MMT Member

Joined: Wed Aug 30, 2017 8:07 pm
Posts: 16
Post Re: Motor runs great til it goes in the water! Video include
I'm going to take it out in the a.m. to actually run it on the water but the left side of the muffler was cold earlier and now it's hot. I sprayed the main jets good with carb cleaner. I couldn't tell how clogged it was though.


Fri Dec 15, 2017 5:30 pm
Profile
MMT 1000 Club
User avatar

Joined: Thu Nov 04, 2010 7:38 am
Posts: 4323
Location: Cut Off, La.
Post Re: Motor runs great til it goes in the water! Video include

_________________
Refurbishing a Prodrive


Fri Dec 15, 2017 6:04 pm
Profile
MMT Member

Joined: Wed Aug 30, 2017 8:07 pm
Posts: 16
Post Re: Motor runs great til it goes in the water! Video include
For some reason it ran good for about 15 seconds then went back to firing on just one cylinder. I believe I'm going to take the carb off again and soak it and make sure it's spick and span...at least if it keeps on i'll know it's not the carb.


Sat Dec 16, 2017 8:45 pm
Profile
MMT 1000 Club
User avatar

Joined: Thu Nov 04, 2010 7:38 am
Posts: 4323
Location: Cut Off, La.
Post Re: Motor runs great til it goes in the water! Video include

_________________
Refurbishing a Prodrive


Sun Dec 17, 2017 6:20 am
Profile
Display posts from previous:  Sort by  
Reply to topic   [ 20 posts ] 

Who is online

Users browsing this forum: No registered users and 224 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to: