2019 Scarab 165g maxed out at 5300rpm

[cmark]

I’m new to jet boats. With 2 people aboard the 165g continuously maxes out rpm at 5300 and 24mph (12mph with 3 adults!). I’ve checked the impeller and wear ring and all looks OK - no debris or damage. A very helpful comment on Facebook suggests reseating the ignition coils and changing spark plugs. I will do this tomorrow. I’ve also used fuel additive to clean the injectors. - I wonder if anyone has any other ideas I can try if the new spark plugs don’t fix things?

 

[Luc Lafreniere]

FYI, almost everyone here on the forum is on Facebook also. Almost...

 

[cmark]

Yes - thought it was worth asking - by the way, do you know how the throttle cable is connected to the motor? Could it be something as simple as the cable loose in its connector so it can’t physically move any further forward on the throttle lever?
I can check this as well on Friday but wondered if you knew?

 

[Luc Lafreniere]

That is possible... The throttle arm is connected to a cable that connects to an electronic module in front of the gauge cluster somewhere on the right (starboard). Where that is exactly and how to access it on your boat, I'm not sure since my 165 is the older model that has a very different design at the cluster. But if you know how to get in there, there's a literally adjustment that looks like a bicycle brake adjustment that allows you to tighten or loosen the cable.

There is no throttle cable that goes to the engine. It's fly by wire. It's electronic from that point to the engine.

And yes, worth asking here. Just letting you know not to get your hopes up too much about getting different types of responses here.