In gear start up protection in a jet tender

[rszarka]

Hi everyone

Got a question regarding in gear protection on a tenders throttle controls.

I have a 10'6 Avon jet tender. It has some sort of in gear start protection. Where the engine will not start if the boat is in gear.

Something has gone wrong with this and I can not start my tender up. Does anyone know how this system works? It is not electrical because there are no electrical wires etc that go from the throttle to the engine so it has to be mechanical.
Trying to figure out how the system works so I can fix it!

A plastic bag got sucked up into my jet intake. So I put the tender in reverse to clear it. I then could not get the boat out of reverse. This was an old problem, if I ever put the gear in reverse I had to shut down the engine to put it back into forward gear or get it back into neutral.

So I shut the engine down moved the throttle back to its neutral position where it normally starts. She has not started up since. I am thinking it may be stuck in reverse. Anyways if I understood how this system worked I think I would have a better shot at getting it fixed

Anyone got any ideas?

Thanks all

 

[src]

On my boats' engines, the neutral safety switch is on top of the engine, not at the throttle, and looks something like this:


It is electrical, tied into the throttle cable, and disables the starter circuit completely.

 

[rszarka]

Src: many thanks for this! Now I understand how it would work the electrical disabling system is on the end of the throttle cable not in the throttle assembly makes perfect sense I was getting ready to pull the throttle apart haha
I am going to the boat tomorrow and will look in a similar location to where yours is. I don't really want to disable that mechanism as I can forsee a disaster. Just imagining that thing starting at full speed lol so yeah will see if I can fix or replace it tomorrow!

Many thanks src for the help! the folks at CSR always have the answers I think it should be a law if you own a boat you must be a member of this website haha

 

[rszarka]

Unfortunately it is not on top of my engine like yours. I am still yet to find the damned thing!
Two cables leave my throttle controls one goes directly to the carburetor and the other to my transmission I believe! I can't follow it as I have to take a few pieces of the boat apart to get to it. Didn't have the tools I needed. It would not make sense for the shutoff to be on the tranny. So yeah still pretty lost with this. Can't find the damned mechanism!

I put the boat in reverse and it got stuck in reverse. Shut it down and have not been able to start it since. Maybe it is still stuck in reverse. Will be very hard to get to the transmission. This is a rigid inflatable. The entrance to the compartment where the transmission is in has a fiberglass piece you have to take out. Only problem all the boats electricals are attached to it. This will be fun!!

 

[rszarka]

I was right it is stuck in reverse. The way jetboats reverse is a hood is lowered over the water being shot out by the jet. Which changes the direction of the water and pushes the boat backwards. There is a cable that goes from the throttle controls to this hood which lowers it into the jet stream or raises it. The bolt that attached the cable to the hood got rusty and broke so I just have to change that coupling and all should be good again. Still have not found where the start in gear protection mechanism is though!

Just putting this up here in case anyone runs into a similar situation with a jet tender in case it is of help to someone one day.

 

[Bucit]

On many outboard motors the wiring for the neutral safety switch is located at the shifter. Attached to the outboard is a main wiring harness (usually red and a big round plug) which the wires run up to the shifter.

 

[rszarka]

Hi Bucit

Thanks for the input unfortunately on my jetboat there are no electrical wires at all coming into the throttles. Just two cables leaving. One goes to the reverse mechanism and other directly into the carburetor. On the throttle housing there is a note which says it has start in gear protection compliant with USCG. But it's a real mystery how it functions given what I wrote above.
No obvious mechanisms anywhere on the engine. Maybe it's built into the carb somewhere but again no electrical wires running into the carb.
The cable that runs to the reverse mechanism just simply connects to a hood that goes up and down. Have to look and see if maybe some electrical wires run to any part of that. Unlikely given it gets wet. So how it actually functions is a complete mystery.
Have a few emails out. One to Yamaha and one to Avon and a jetski place. Would be nice to figure this out.