Been building an airboat

[FinsnFur]

She's on the phone while demonstrating the trim mechanism

[Coyotes-R-Us]

 :innocentwhistle:Working on the accelerator. On a VW motor single carburetor the butterfly leavers need about 3" of movement.
I'm trying to use the thumb leaver off the snowmobile or maybe the brake lever but they only give me about an inch
of movement. I have tried serval "Bell crank" set ups with out any luck.
Finally, I think I'm on the right track. It's a leaver and pully set up to Pull from the back of the butterfly linkage.
If I use the long part of the leaver to actuate the butterfly and WAY down near the bottom for the thumb leaver cable.
I Think I will need to use the hand brake leaver to get enough leverage to open it with only one hand.
Now I have to think of a way to mount the cable to the motor somehow/ somewhere .
It's been a few weeks of trial and error . I need to get past this and start the trailer.

[Coyotes-R-Us]

First water test

https://www.youtube.com/watch?v=RGSZIXDUaM4&feature=youtu.be

[nastygunz]

Saweeeet!👍👍👍👍👍

[Todd Rahm]

It floats, that's a positive sign. 

[Okanagan]

Niice!  Wish I had that airboat for fishing salmon on the Fraser River.

Running the river is like boating on a chocolate milkshake that is anywhere from two inches to 100 feet deep with no way to tell which.  Gravel bars, rock ledges, giant sunken stumps and logs.  The guide boats all run jet drives. 

[Coyotes-R-Us]

We have a jet drive too 18', but I hope to use this one on thin ice too...

[Coyotes-R-Us]

Another up date:

Water test
To bad the wind was 50 mph and cool we would have made some
adjustments on the river bank.
The movement of the motor and other weight back helped a bunch.
I still can move the motor but a lot of effort.
I was going to move it a foot then chickened out and went with 6".
Could have gone 8".
I'm going to lift the prop end another inch I went with 2 the first time.
We had troubles with the 64" prop hitting water as it splashes in the back, It eroded the prop some in a 15 minute test. I could get 3900 rpm with the new gears that puts me around 2500 rpm on the prop.
We put the 3 blade 59" prop on with the steepest pitch blocks I can get. 4600 motor rpm that's 2900 rpm on the prop.
Max for the prop is 3100 And I don't want to run that many rpm if I don't have to. I'll try a different sprocket I have. I can back off to 1.3 instead of 1.6 ratio. If I can get 3700 on the motor that's 2850 on the prop. About the same and 800 rpm less on the motor.
Here is the test vid.
https://www.youtube.com/watch?v=8M0729cm8_A&feature=youtu.be

https://www.youtube.com/watch?v=4rFGNgWk2Fs&feature=youtu.be

[FinsnFur]

Looks like fun
Is she heavy? Looks like it's plowing a lot of water.

[Coyotes-R-Us]

It is heavy.
I have some plans to get the nose up.