2019 Supra SL450 having issues getting to surfing speed

[Broke Pilot]

Well that’s interesting to hear that the gps can limit power. When I switched props on my SA400 I thought it was odd that the motor wasn’t spinning to a higher rpm when pulling up a surfer under full load. Now I wanna do it with the zero off ‘off’ and see if it makes any difference...

[Ryann]

I wonder if zero off limits rpm so that it limits prop slippage. You could drop the hammer and let the cruise control do everything.

[Broke Pilot]

That’s generally what I do. I always have it on with a set speed and just let it eat.

[larry_arizona]

That’s generally what I do. I always have it on with a set speed and just let it eat.

Ditto



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[KnoxMojo]

Anyone running full ballast for wakeboarding? Mine will launch then the auto-launch kicks in, but only for a 2 seconds. It will go in and out of auto-launch but never get to speed, just bounces the nose up and down. I have calibrated the inclometer and set the crossover point to deploy until 90% of set speed. It will not get up to speed until I dump about a quarter of the weight out. And like a couple of y'all, it only pulls at around 3600 rpm until it gets on plain then will climb higher. It has to be something in the programming.

[larry_arizona]

My guess is the PCM/Zero off doesn’t like prop slip.

Knox, what prop are you running?


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[KnoxMojo]

I've ran several, all the same issue. Right now, the OJ 951, have also had in a 945 and 950... currently looking to borrow an ACME 15x12.5 to try out..I just hate running high rpms getting around the lake.

[Prospersigman]

Anyone running full ballast for wakeboarding? Mine will launch then the auto-launch kicks in, but only for a 2 seconds. It will go in and out of auto-launch but never get to speed, just bounces the nose up and down. I have calibrated the inclometer and set the crossover point to deploy until 90% of set speed. It will not get up to speed until I dump about a quarter of the weight out. And like a couple of y'all, it only pulls at around 3600 rpm until it gets on plain then will climb higher. It has to be something in the programming.

From my experience having driven and owned the 400, the 450 and currently own the 550 (all boats heavily weighted with a large crew) the 400 struggled to get on plane in wakeboard advanced mode at 100% all the way around. I would have to have 4 adults in the bow and dump weight to get on plane. With the 450 and 550 that is not a concern it gets on plane much easier. I've made this statement before but typically hear that the 400 is plenty, but that was not my experience.

[KnoxMojo]

That's what I'm beginning to think. The 400 in our Mojo was more than enough, but it weighed 1000 pounds less, and fully loaded was about 1500 pounds or so less overall than the SA.. but the Mojo only had the center plate and still got up. The SA with 3 tab launch doesn't even come close.

[z28ke]

My 400 was struggling a bit getting to surf speed yesterday until I moved a few extra bags of lead to the bow. The engine sounded much louder than normal and was running a couple hundred rpm higher until I moved the weight. It was also 96+ degrees out so that didn’t help.