f1 tunnel hull - RC Groups
Thread Tools
Oct 10, 2011, 10:44 AM
Registered User

f1 tunnel hull

Hi I have part of what I think is a f1 tunnel hull boat and was wondering
if enyone is could tell me more about it.
Also i am wanting to sell it and would like 75.00 out of it.
It it is mising tho top cover and is just the hull and moter.
The moter is a K&B 3.5 water cooled and I think the is home made but looks good although it just has a coat of old paint on it[i think the guy just never finished it] I will get pics on as soon as i can and would like to lern more about it thanks.
Sign up now
to remove ads between posts
Oct 11, 2011, 01:12 AM
RC boat Rock Star
Pictures will help immensely then from there we can play the popular online game show "Name That Hull!".
Without seeing it the hull part might be the hard part to sell if it doesn't have the cowl. With the K&B 3.5cc OB, that's more of what the selling price will dictate. The really old first generation of K&B 3.5's are the hardest ones to get parts for and aren't that desirable anyway. The rest of them are more like a small-block Chevy as although they went through changes over the years, parts are still plentiful. You might get $75.00 sight unseen but buyers will want to know the condition of it. Things like a broken skeg on the lower unit kills the price even though it isn't all that expensive to replace.
Oct 13, 2011, 01:56 PM
Registered User

boat pics

Here are some pics of the boat if you need more I will be happy to get more on.Thanks. [by the way i see that i have a typo in my user name how do you fix that?.]Hmmm pics not loding very fast guss thats what you get with dial up.
Oct 13, 2011, 04:18 PM
Registered User
wparsons's Avatar
Don't see any pictures....?
Oct 13, 2011, 04:40 PM
Registered User
Think it worked!
Oct 13, 2011, 05:26 PM
Registered User
coriolan's Avatar
Kind of look like a Jerry Dunlap design wooden hull, wouldn't not be too hard to make your own cover out of foam, cover it with fiberglass+epoxy and then dissolve the foam. Or fabricated out of thin plywood(1/32")and a few formers.
Oct 13, 2011, 06:56 PM
Registered User
Thanks for the info
Oct 13, 2011, 11:33 PM
RC boat Rock Star
Seeing how it appears that you want to sell it, I'd make firewood out of the hull as it'd be cheaper just to sell the outboard alone and save shipping and boxing costs. It would take a lot of work and money to fix up that old hull.
What it is, I haven't got a clue as there have been a lot of kits made over the decades.
It's hard to age the engine also as they made that version for a long time. What little that I can tel you is that it has the 12mm crank, the newer ones have a 13mm in them. The black carb is an easy one to tune, usually around 3-1/2 turns out from closed gets it really close to where it needs to be.
The motor mount is a Prather, a real pain in the asterisk to adjust. The hull looks like a Prather but as far as I know, they never made a wood kit, only epoxy-glas.
This motor was cheap in the day as you could buy one new from Tower Hobbies for $115.00. Clean it up and that'll help the price. Most of the time a can of carb or brake cleaner will do wonders on it.
Nov 08, 2011, 02:42 PM
Registered User
dirtrackracer2's Avatar


thats a dumas wood kit . hot shot 7.5
Nov 08, 2011, 02:51 PM
Registered User
dirtrackracer2's Avatar


thats a dumas wood kit . hot shot 7.5 i think its discontinued
Nov 08, 2011, 08:11 PM
Registered User
wparsons's Avatar
That's definitely not a 7.5cc engine, you can see the 3.5 in one of the shots.
Nov 09, 2011, 12:15 AM
RC boat Rock Star
Dumas made only one wood .21 OB tunnel that I know of, the others were gel-coated 'glas and the other was ABS.
The stepped bottom is the unusual part which should be a give-away for someone unless it was modded by the builder. That was ahead of its time figuring how old the hull is.
Nov 10, 2011, 09:03 AM
Registered User
Thanks for info.
What do you think of selling it on ebay

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Off Site F1 Tunnel Hull with Motor Upgrade Wattsup23 Boats (FS/W) 2 Apr 27, 2011 09:05 AM
Wanted Mrp f1 tunnel hull stinger312 Boats (FS/W) 4 Apr 26, 2011 10:57 PM
For Sale F1 Tunnel Hull with Motor Upgrade Wattsup23 Boats (FS/W) 3 Apr 20, 2011 09:21 AM
Wanted Any F1 Tunnel Hull miyage007 Boats (FS/W) 2 Apr 17, 2011 11:44 PM
Discussion Depron F1 vhull and soon tunnel hull zoot Racing Boats - Electric 0 Apr 24, 2007 08:06 AM