115 motor issues input needed

Joined
Nov 8, 2013
Messages
20
Motor is a 2000 115hp model J115PLSSB.
I'm about ready to sell the damn thing its just been a headache sunce I got it. Let me give you little bit more background of when the issues started. I bought the boat in August at a dealership put tge boat in a tank ran fine everything checked out. Took it out for a lake test a few days later started right up running fine for about 20 minutes decided to go WOT and see what she had, was running wot around 5000-5500 rpm boat jerked rpms dropped the revved back up keep doing this. Decided thst was enough went to start heading to ramp could not get the motor to run, it would start then as soon as I gave it throttle it would die trolled back to the ramp.Got home put the motor on muffs started right up idled fine.Took cover off just to look around pulled the fuel filter it was nasty with black stuff cut it open it was chucks of rubber hose, pulled fuel line and cut it it was clogged with rubber idk even know how fuel got through, Replaced the filter and line inside the motor, also replaced the line from tank to motor new bulb and everything. Figured that fixed the problem took it to the lake ran fine for about 20 minutes until I hit around 5000 rpm same issue of jerking and rom drop/rev. Trolled back went home, tried hooking up to muffs next day it would not idle longer then about 1 minute, tried external tank etc if you keep pumping the bulb it would keep running. Took to boat shop the said the carbs were dirty didn't have them clean them as they wanted 675 dollars. So since then I noticed the right side had no spark changed the plugs and power pack fixed the fire issue. Installss the used vro no change in how motor ran. Friend came out with external tank again tried again no choice. Hes saying it the stator and rectifier. The right side of the block was hotter to the touch then the left, he pulled rectifier it was really hot, it supposed to be water cool, the inside of the block was steaming. Could the stator and or rectifier be getting to hot sending wrong amount of voltage causing the fuel pump not to work or is this more of an fuel issue possibly both?Were do I go from here? Any input would be greatly appreciated. Thanks guys.
 

Bosunsmate

Admiral
Joined
Apr 7, 2012
Messages
6,135
Re: 115 motor issues input needed

Nothing should ever be steaming.
Were you using muffs at the time or was the motor properly submersed in a tank or in the sea/lake?
To be properly submersed the water needs to be at least 5 or six inches above the anti-cavitation plate.

Your overheat alarm should of gone off. How hot were the heads, could you hold your hand on them for at least thirty seconds?

$675 to clean the carbs, id keep away from them too.
You could also try pulling the safety line so the engine doesnt spark and then turning the engine over with the starter for a few turns and removing the plugs to check they a all wet with fuel.
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 115 motor issues input needed

New boater, you should stick to one post as it's less confusing and the readers will get some history. Read the rules at the top of the forum !! Thank you.
 

Bosunsmate

Admiral
Joined
Apr 7, 2012
Messages
6,135
Re: 115 motor issues input needed

New boater, you should stick to one post as it's less confusing and the readers will get some history. Read the rules at the top of the forum !! Thank you.

Oh not again!
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 115 motor issues input needed

Yes !! Maybe more should read the rules !!
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 115 motor issues input needed

I can read them okay. If one can't follow the rules maybe one should not post on the forum.
 
Last edited:
Joined
Nov 8, 2013
Messages
20
Re: 115 motor issues input needed

Sorry Boobie was trying to get a few more ideas from other individuals. Won't happen again sir. As for being able to touch the heads that would be a negative after a couple seconds it would be to hot to touch. I was just wondering if the electrical aspect of the rectifier and or stator could cause the fuel pump to not work if it is delivering to high of voltage.
 

Chris1956

Supreme Mariner
Joined
Mar 25, 2004
Messages
28,559
Re: 115 motor issues input needed

OMS (proper name for VRO pump on that model) is not connected to electrical, except to power "no oil" sensor.

Sounds like you need to fix overheat issue. Did you test thermostats? Do you know the last time the waterpump was serviced. My '98 Johnny 60* V6 has about 20+ PSI of water pressure when running at 2/3 throttle, more at higher RPM. I would think you would see the same if your cooling system is working properly.
 

boobie

Supreme Mariner
Joined
Nov 5, 2009
Messages
20,826
Re: 115 motor issues input needed

Agree + 1................
 
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