Turning the bars puts in limp mode lol

Location
661
Sounds crazy right... but that's what I got on this 96 blaster I just picked up... Fine if the bars are straight it has its normal power then as soon as you turn the bars it just chops it and puts it in a limp mode rev limiter. Doesn't matter if you're WOT and turn them or doing donuts holding the bars turned, it'll sit there and rev limit all day. And throttle position besides idle makes it do this, also only happens in the water. Yamahas are pretty new to me coming from my 750 X2, it all pretty much looks similar though. Maybe you guys know some problem areas with them though.. Only motor mods are Protec head and pipe.

First few things I checked was if the steering was pinching anything with the hood closed, it's not everything looks clear and nothing tight on the wires. (still suspect on the killswitch since it's the only thing related to bar movement through the wires...)

I pulled the carbs off and went through both of them, both are clean that appear to be rebuilt at some point so everything looks good there. Internal carb filters looked very clean as well.

Checked the pick up tubes in the gas tank and both ON and RES look good and I blew through them to check for air leaks, everything passed there. Check Valve works great too while I was there.

Next thing I did was open up the ebox to see if there was any obvious wire pinching. Clean ebox no obvious problems, I did remove the over temp sensor and unplugged it while I was in there as well. Haven't water tested it with the sensor deleted though. Just read that seems to be a common limp mode enabler.

My next test will be trying the temp sensor delete and then I'll be trying to disconnect the killswitch and see if it does anything.
After that I'll just be trying different electronic components.

Guess my question for you yamaha guys is, what are the common parts to put it into limp mode? We'll just pretend it does it with the bars straight too haha
 

mike b

Michael "Mayhem" Bevacqua aka MikeyChan
Location
California
I could only think of the temp sensor.

I would try disconnecting the s/s switch and test again. Turn your idle down so it will finally shut off.

I've heard of power loss when turning on flatwater boats caused by water going into exhaust but not on a stock boat like this.
 
Try the temp sensor for sure it’s very common of what your saying. Just delete it. You can use the spot in the ebox for accessories.


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OCD Solutions

Original, Clean and Dependable Solutions
Location
Rentz, GA
The temp switch has a 15-30 sec delay so if it's instantaneous with the turning of the bars, it may not be the temp switch.

Does it matter which way the bars are turned or how much?
 
Under full right turning lock ski has no power, immediately after straightening the bars power come back on. Turing left slight loss of power. Also cant side mount on either side.
 
Location
661
Turns out my problem was the protec nozzle was getting blow by out the sides and choking the exhaust. Put a stock nozzle on and instantly fixed it. Went back to the protec using a silicone coupler on the exit nozzle to block the sides when it's turned and that also fixed it. Bizarre issue but glad it's fixed! sorry for the delayed response guys.
 

OCD Solutions

Original, Clean and Dependable Solutions
Location
Rentz, GA
Turns out my problem was the protec nozzle was getting blow by out the sides and choking the exhaust. Put a stock nozzle on and instantly fixed it. Went back to the protec using a silicone coupler on the exit nozzle to block the sides when it's turned and that also fixed it. Bizarre issue but glad it's fixed! sorry for the delayed response guys.

^^^ That possibility crossed my mind too. How much throttle did you have to apply before it became noticeable.
 
Location
661
^^^ That possibility crossed my mind too. How much throttle did you have to apply before it became noticeable.
not much it seemed like, when turning anything over a 1/4 seemed to choke it out. I was testing just going in circles at different throttle positions, seemed to start acting up anything over 1/4 throttle.
 
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