Blaster B1 anomaly

[Jhucke]

An occurrence happened last weekend when riding my blaster where it died suddenly when turning sharply and unhooking the pump whipping it around. Right away I thought potential needle and seat issues, but of course I don't remember which way I was turning. If I had to guess, it would have been a left hand turn which leads me to believe that the force of the turn could have stuck the needle into the seat where it would not open momentarily causing a lean condition.

Other thoughts of mine were water ingestion issues possibly at the crank seals. I would imagine the largest load I could put on the motor would be in a turn like that.

Has anyone had issues like this before? I wanted to post this thread before I start throwing money at the machine because after inspection of the needle and seat on the carb, it doesn't appear to be excessively worn, but perhaps it still is.

61x motor, single 44 all stock btw.

 

[Quinc]

Check the pop off and make sure the seat has a crisp "pop". Sometimes the oring on the outside of the seat goes bad and leaks as well. Also groupk wrote something about skis dying in a hard turn.

 

[Jhucke]

Check the pop off and make sure the seat has a crisp "pop". Sometimes the oring on the outside of the seat goes bad and leaks as well. Also groupk wrote something about skis dying in a hard turn.

I found the article I think. It was the one where they compared different carb models. They referenced that turning at full throttle is by far the hardest load an engine can experience, especially to the left, and that some carbs have a hard time flowing enough fuel to keep up. Didn't really offer any solutions.

 

[Jhucke]

Well I think that my needle and seat is shot on my blaster. I went to ride it yesterday and it was really hard to start in the driveway. When it finally started coughing and running, it blew tons of black, oily gas all over my driveway (sweet, just what I wanted). Once it finally cleared out, it revved how it normally does and didn't have any issues the rest of the day. My only thoughts are a faulty needle and seat in the carb.

 

[Jhucke]

I'm having another issue with my blaster. I think it is electrical related because it only gets worse the more I ride it. Basically I have the low end dialed and when I went to dial in the top, I tried running wide open and after a couple seconds, it loses almost all it's RPM's and comes close to dying. It's not seizing, I am running stock jetting 135 main, 115 low, 30 psi pop off and the high speed screw was set over two turns out. I trimmed the plugs and installed MSD boots and took it back to the water. Again, the dying at full throttle issue continued and got worse the hotter it got. I have a CDI spare swapped in and will run tomorrow to see what happens. Anyone else have any suggestions? By the way, I also rebuilt the carb, ensured the check valve was working, and put new gas in the tank.

 

[Citizen]

Running out of fuel would be my guess, seem like that popoff is a bit high too.

 

[Jhucke]

Running out of fuel would be my guess, seem like that popoff is a bit high too.

Of course that was our first thought but from what aspect of the machine? Lines are clear, carb is clean and rebuilt, filters are clean, jetting is right where it should be. Also the pop off is where I want it I think.

I'm thinking electrical at this point.

 

[Citizen]

Internal filters in carbs fine too right?

 

[Citizen]

Does motor still have temp sensor?

 

[Jhucke]

Internal filters in carbs fine too right?

Internal was replaced with the rebuild. Temp sensor was deleted.

 

[Citizen]

I had an issue on my fuel pickup in a A/M tank where at high rpm it would pull enough fuel to suck itself to the side of the tank and kill my fuel supply. Have since made sure i had fitting on the end that couldn't seal to the side of the tank. Not sure if you are running a stock fuel tank or not.

 

[Jhucke]

I had an issue on my fuel pickup in a A/M tank where at high rpm it would pull enough fuel to suck itself to the side of the tank and kill my fuel supply. Have since made sure i had fitting on the end that couldn't seal to the side of the tank. Not sure if you are running a stock fuel tank or not.

Thanks for the tip. I will check this tomorrow, but yeah, stock tank.

 

[Jhucke]

Well we spent hours replacing literally every electrical component, swapped carbs, checked compression only to find out the rear crank seal was blown out. Sometimes its worth taking 20 seconds to realize what you have in front of you before getting all hot and excited. Really weird symptoms, but we found this issue. Very relieved. Thanks to everyone offering suggestions.

 

[tatronation]

Eagle eyes over here.