James c harrell

My Feedback: (18)

I run a O.S. 81 on my tunnel. It is pretty fast and rides very low and can't take very rough water. I was wondering if any one has come up with a design for a intake tube that will help keep water from being sucked into the carb quite so easy. Seems my driving skill isn't up to par with this boat and I tend to drop the nose now and then. Water gets up there and that huge carb will suck it up in a hurry. I have done some trim work with her and have it to where it runs as high as possible without coming completely out of the water. Thanks to a lot of you guys she runs and handles great. I just think there could be a way to get air a little better than a huge hole pointing straight forward like it does. Any ideas?

F1TUNNEL

Can you post some pics of your tunnel please,
Cheers,
Dion.

James c harrell

My Feedback: (18)

If the site will let me. Cool, it appears to be co-operateing this morning.

F1TUNNEL

You could possibly try a trumpet style extension on the intake,

Ron Olson

My Feedback: (1)

Look again. The problem appears to be the water exit line letting the water run down to the carb at low speeds.
Right now, that's the only thing that I can see.
How about a picture showing the front of the cowl.

advanced builder

What about adding a shield that bolts into the wooden framework, or adding tape to the front of the cowl before launch

HendricX

What he needs is a 'splash-guard' in front of his carb.

How it can be made ? ..... I need more/better pictures.

James c harrell

My Feedback: (18)

I have been thinking along the lines of a splash guard or maybe an intake tube that will keep the water from "splashing" up into the intake. I will try and post some more pics if I can. For some reson the site won't let me most of te time but maybe it has fixed it-self.I don't know if water is getting in from the water vent tube. It tends to go up and over the boat. The pick-up is on the rudder. I like it there because I can see it better. This thing is pretty hard to keep in site unless I run it down with my Bass boat. I took a video of it running on it's first run and it was running pretty low then. I have since adjusted it so that it runs a little higher and it runs a bigger prop but you can take a look at the video at

http://youtu.be/OtDhhUsMYns

I will take some more pics of the front and the cowl and see if I can get them up here.

James c harrell

My Feedback: (18)

I took some more pics of the front end of my boat. I think alot of the water was from the front edge of the hatch cover. It wasn't sealed and I think the water was getting in when it turned the front fork would let it come over the top a little and it would go right in and along the top of the tank and just like a vacum cleaner the engine would suck it up. I put a strip of weatherstripping along the front and down both sides to help. Still would like to pull some air from somewhere other than striaght forward.

borristhboxer

Try to set up a reverse style air scoop.
Sounds weird but it will let the air in & keep the water out if its in the right position.
I've done it to a few of my boats & it's worked great

HendricX

If water is over the deck , it runs over his tank , straight into the carb.

Find yourself a silcone-tube with a snug-fit over your carb-mouth ,

then find a piece of 1.5" plastic tubing (2"wider as your tank .. ore more) ,
drill/cut/file in the middle so that it has a tight press-fit over the silicone-tube ,
now your air-intake is in (or near) the sponsons.