3.5cc K&B Gold Series Outboard Racing Motor and Tunnelhull FOR SALE - RC Groups
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Aug 29, 2007, 12:49 AM
Registered User

3.5cc K&B Gold Series Outboard Racing Motor and Tunnelhull FOR SALE

Here is the link to the Ebay ad:

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Aug 30, 2007, 12:37 PM
Never Fast Enough
Which tuned pipe, I never saw one in the photo's. 55mph using a K&B is really pushing it. Personally I have never seen it done, specialy on a hull that is only 25" long.

Oh and the O.S. can hit 55mph without a pipe. It current holds the class sport tunnel record - namba.

Aug 30, 2007, 01:54 PM
Registered User
Whatever. I figured I'd cause an uproar by insulting the great "OS". I'm guessing that you own an O.S.?
Personally, I think they are one ugly motor, never liked the looks of em. Way overpriced too. The exhaust on those motors is just so lame and awkward looking. They do look cool with a custom pipe though.
I bet the O.S. holds the record since it is just about the only motor out there these days, no competition.
Last edited by Tbone2000; Aug 30, 2007 at 02:01 PM.
Aug 30, 2007, 04:18 PM
Never Fast Enough
It's the only engine out of:

K&B 3.5 standard, K&B 3.5 SS, K&B 3.5 SX, CMB 3.5, MAC 3.5, ROSSI 3.5, THUNDER TIGER 3.5.

The O.S. is of better quality then the K&B and can be modded a whole lot more.

Which tuned PIPE are you selling?

Aug 30, 2007, 11:56 PM
RC boat Rock Star
I wasn't going to comment until I saw that you said that the boat would do 55 MPH. I owned a K&B 3.5 SS and the boat never got anywhere close to 55.
I also know how bad the Thunder Tiger hull is as any decent OB tunnel doesn't need trim tabs as all they are is a bandage for an ill-handling hull.
K&B and Dumas both did work on the engine and a Dumas hull, they only got 45 out of it. It was in ads in RCBM back when the engine first came out.
Jul 17, 2008, 12:06 PM
Registered User

Should I buy a Thunder Tiger OD Boat?

I am thinking about buying a Thunder Tiger OD 3.5. Need to know the good, bad and the ugly. Any help is appreciated.
Thanks in advance.
Jul 17, 2008, 12:22 PM
RC boat Rock Star
Finicky carb and the worst of the 3 brands of real model OB engines. The OS is the hot one now stock.

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