G3 Boat

beckoning

Petty Officer 2nd Class
Joined
Dec 15, 2010
Messages
171
G3 boats are by Yamaha. I have a 2005, 18' model I bought. Great boat, but I have questions. Yamaha hasn't been very helpful. Does anyone have a G3 boat of that vintage? It has 3 live wells/aereators, and I can't figure them out. Maybe it's just me. I have other questions if anyone knows the G3 boat.
 

Jeff J

Petty Officer 2nd Class
Joined
Jun 23, 2021
Messages
173
I own a G3 sightly smaller and a few years newer. Throw the questions out here. Someone will know the answer.
 

StewartL

Seaman Apprentice
Joined
Jul 23, 2025
Messages
36
For the live wells, check for any unmarked switches or valves near the wells themselves; older setups can be unintuitive. A general marine mechanic could also help decipher the system if you can't find other owners.
 

beckoning

Petty Officer 2nd Class
Joined
Dec 15, 2010
Messages
171
What exactly is the issue with the livewells?
There are 3 "live wells". The rear well is fairly obvious. It will fill and manually drain. It has a removable standpipe. The bow live well at the bow is not used. It is the live well immediately in front of the helm that is most confusing. 1) it seems to fill for no reason. 2) once full, I can't figure out how to drain it. 3) I would never use it.

I fish for salmon + lakers on Lake Michigan, keeping all to eat. Once caught, they go to the stern well where they bleed out. I have no use for the other 2 "live wells" or "aerators" or whatever they are.
 

beckoning

Petty Officer 2nd Class
Joined
Dec 15, 2010
Messages
171
For the live wells, check for any unmarked switches or valves near the wells themselves; older setups can be unintuitive. A general marine mechanic could also help decipher the system if you can't find other owners.
Stewart, I'm miles from a marine mechanic. There are no unmarked or hidden switches I can find.
 

Jeff J

Petty Officer 2nd Class
Joined
Jun 23, 2021
Messages
173
Is the middle livewell just doing its own thing at random or is it operating at the same time as another livewell? Does it cycle on every few minutes (aerate)?

Can you post a picture of your switch panel and maybe a couple of the middle livewell?

Basically, I am wondering if it is on its own switch or if it is sharing one. It is possible someone modified the wiring to suit them.

My livewell switches are 3 position rockers. I can’t remember how they are labeled but I know down is on, middle is off and up turns on a timer that cycles the pump on and off every few minutes.
 
Top