Not sure if this is relevant, but I have owned a few Yamaha’s. The ones I have had were equipped with a limiter arrangement that would slow the revs if they had low oil, high heat, etc. It could be as easy as a toggle switch on one of these sensors. Fool the engine into thinking it needed to slow down. I am thinking of something like a ignition switch that would be key operated.
Just thinking out loud
ZX
quote:
Dang, apparently some people just can't help being a fool. The boat turned out beautifully Larry. It is really neat to see it finished since I was able to see it in it's earlier stages. I know its tough but I'm not sure I'd turn kids loose in it alone.
Thanks Doug. It’s still not finished, I have a lot of wood trim left to install, cypress and ipe, and a cypress planked deck. Weather hasn’t been warm enough for epoxy lately. Then it’s off to Martin Marine for a custom T-top, leaning post, swim platform, stake out brackets and upholstery. All of that will slow it down some too.
quote:
Just thinking out loud
Liking your thinking, any reasonable thoughts are welcome that don’t involve kill switches or telling me it’s the client’s problem. 
quote:
See if you can get a call in to Mr.Chris or to Yamaha,maybe someone would be able to answer that question.
I will, if I don’t get an answer here. Probably just a matter of time before we hear from Chris, and then we can all learn something.
Capt. Larry Teuton
Cracker Built Custom Boats
“Ships are the nearest things to dreams that hands have ever made.” -Robert N. Rose
Couple more pics…
Capt. Larry Teuton
Cracker Built Custom Boats
“Ships are the nearest things to dreams that hands have ever made.” -Robert N. Rose
Getting the governor situation resolved might be tough to do with it completed. I believe a lot of it has to do with the carbuerator/fuel set up. Jet skis and autos have these built into the keyfob which communicates electronically with the engine cpu and fuel system. Unless this came equiped from Yamaha, it may not be feasible as an add on.
If it is a standard engine with analog gauges, the engine does not have the capability to provide external communications electronically.
If you can find a good Yamaha tech rep, you might find out what is available from Yamaha.
Sea Hunt BX22 Br
WS Tarpon 140
quote:
I believe a lot of it has to do with the carbuerator/fuel set up.
This engine is fuel injected.
quote:
If it is a standard engine with analog gauges, the engine does not have the capability to provide external communications electronically.
No it’s a 2014 model with digital everything. Nothing analog on the boat except the fuel gauge sending unit. 2 Yamaha Command Link digital gauges with about 30 functions, all connected through a data hub, with GPS, VHF, even the trolling motor all interfaced together. You can drive the trolling motor from the GPS 
Capt. Larry Teuton
Cracker Built Custom Boats
“Ships are the nearest things to dreams that hands have ever made.” -Robert N. Rose
Great looking boat for sure. Large trim tabs with skegs welded will put more control in the rear end but I bet the new owner enjoys the ride as it is.
big dog
I answered thiss earlier, but somehow it didn’t post
no, there isn’t a digital solution
the only way would be some type of mechanical limit on the console
wow, we do a great job installing motors
I’d drop the horse power if I were selling it,cause a good lawyer would eat your lunch in the event of an accident.
This reminds me of some Charleston boys and a 15 whaler with a 115 Evinrude back in the 80’s.
I would be careful on that one Georgia Cracker.
quote:
Large trim tabs with skegs welded will put more control in the rear end
It’s already got large hydraulic Bennett tabs, with Bennett automatic gyro control system, ATC I think it’s called. Tabs don’t slow it down much, but I did learn that if I wanted to turn, I could first tab down in the direction of the turn and the boat will ride up on the chine and track better.
Capt. Larry Teuton
Cracker Built Custom Boats
“Ships are the nearest things to dreams that hands have ever made.” -Robert N. Rose
quote:
I answered thiss earlier, but somehow it didn't post no, there isn't a digital solution the only way would be some type of mechanical limit on the console wow, we do a great job installing motors
I’m sorry to hear that. I will figure out a mechanical limiter. Thanks for the reply. Yep, yall did a great job on the install
Capt. Larry Teuton
Cracker Built Custom Boats
“Ships are the nearest things to dreams that hands have ever made.” -Robert N. Rose
quote:
I'd drop the horse power if I were selling it,
This boat was sold before I cut one piece of wood or mixed one cup of epoxy.
Capt. Larry Teuton
Cracker Built Custom Boats
“Ships are the nearest things to dreams that hands have ever made.” -Robert N. Rose
I’m not really satisfied with the answers so far. Not that I don’t appreciate the thoughts, but there is a solution to this. In this computer age there has to be an easy solution. I can’t be the first person with this concern and re-inventing the wheel is generally not a good idea. Somebody has already resolved this situation somewhere and I’m going to find them.
SIM Yamaha is my next stop. They are a wealth of information. I could post the question on THT, but would get 600 replies, with only 1 or 2 of any usefulness at all. 500 would tell me there was a thing called a kill switch lanyard.
Capt. Larry Teuton
Cracker Built Custom Boats
“Ships are the nearest things to dreams that hands have ever made.” -Robert N. Rose
Try spliting a pc. of 1/2" pvc and installing a short pc. over the throtel cable to limit wot! Once you find the right length (trial and errer) put a hose clamp on it, shouldn’t take long to install and take off for the adults but don’t show the kids!
quote:
Originally posted by boatpoorTry spliting a pc. of 1/2" pvc and installing a short pc. over the throtel cable to limit wot! Once you find the right length (trial and errer) put a hose clamp on it, shouldn’t take long to install and take off for the adults but don’t show the kids!
That right there is genius in its simplicity. That would be my solution. Wouldn’t take 30 seconds to install when the kids want to run.
“Banana Pants”
Indigo Bay 170
90 Johnson
Wilderness Ride 115
Instead of revamping that great looking boat and motor setup, could you convince the owner to get the kids their own boat? Something with a little less HP and safer handling? My first boat was an old Carolina runabout. It came with a 10 HP motor and was safe if a little slow. Later I put an 18 HP and a speed prop on it. Top speed was around 30 mph and that was plenty fast enough in that little boat. Sometimes I wish I still had it.
You could add an electronic rev limiter into the engine control circuit. Put the “black box” in a small locked compartment. Googled at least one for marine applications that said it could go 20% up or down and a suggestion to use a motorcycle rev limiter on the hull truth.
quote:
quote:
Try spliting a pc. of 1/2" pvc and installing a short pc. over the throtel cable to limit wot!
Excellent suggestion, thanks. Will explore that if I can’t find an electronic solution.
quote:
You could add an electronic rev limiter into the engine control circuit. Put the "black box" in a small locked compartment. Googled at least one for marine applications that said it could go 20% up or down and a suggestion to use a motorcycle rev limiter on the hull truth.
Now we’re getting somewhere. Appreciate that input:smiley:
quote:
Instead of revamping that great looking boat and motor setup, could you convince the owner to get the kids their own boat?
Now there’s an idea. I’d love to build this man another boat
Capt. Larry Teuton
Cracker Built Custom Boats
“Ships are the nearest things to dreams that hands have ever made.” -Robert N. Rose
I was thinking a nice bump stop on the console with a desk drawer type lock built into the face so with a single key you could remove it
I was just thinking the same thing. Fab it out of starboard, and when it is removed all that remains is a small tab that the key lock would have latched onto. You can get rotating drawer locks from Lowes for $4. I just bought 2 to go on my teak hatches on the Whaler.
Or make it out mahogany or teak to match the boat.
“Banana Pants”
Indigo Bay 170
90 Johnson
Wilderness Ride 115
Yamaha said nothing is available and the tech I spoke with said no one had ever asked to go slower they all want to know how to go faster.
if the rev limiter thing works that may be the way to go, but there wont be any factory support for making it work