B Stock Tunnel

[TomGracey]

So what is the hot NAMBA B Stock Tunnel Engine

 

[Carl Van Houten]

There is only one choice at this time for an off the shelf stock engine and that is the O.S. outboard. Contact Ron Shaw for pricing.

 

[HTV Boats]

NAMBA B is a 45, so a legal old K&B (not available) or twin OS 21's. Does anyone know if an old can muffler K&B would qualify with the new K&B lower now available would qualify? Red or Gold Head, 8701-8702 and what carb would qualify?
Mtc

 

[LohringMiller]

From the NAMBA rule book:

A manufacturer of outboard motors for NAMBA stock outboard racing is one
who is responsible for the original design and manufacture of the following:
crank shafts, connecting rods, cylinder heads, pistons and sleeves, crank cases,
drive shafts, drive shaft housing, swivel and stern brackets, propeller shafts,
and who has complied with any other requirements which are provided for in
these rules.

For the stock classes, the engine’s parts must remain as originally
manufactured for that brand, size, and style engine. No modifications are
permitted. Interchanging of parts from one series or edition to another is legal
as long as the parts used were made by the manufacturer of the engine and
were used on their outboard engines.

No replacement parts for current production motors will be considered as a
standard production part until this part appears on the current production
motors which can be purchased through normal channels.

Since K&B engines aren't being made any more, only old K&B 7.5 parts would qualify.

Lohring Miller

 

[Carl Van Houten]

I keep forgetting that NAMBA "B Class" is actually the 7.5 class. Not really sure why they do that but I am sure that they will never change it.

 

[Jerry Dunlap]

I keep forgetting that NAMBA "B Class" is actually the 7.5 class. Not really sure why they do that but I am sure that they will never change it.

When "Hell Freezes Over ."
JD

 

[Carl Van Houten]

If that's what floats your boat JD... You are not going to get any push back from over this way. But when you come to our pond, B Class is the 3.5cc guys. If someone manufactures a 12 outboard what are y'all going to call it? A-?

 

[Jerry Dunlap]

If that's what floats your boat JD... You are not going to get any push back from over this way. But when you come to our pond, B Class is the 3.5cc guys. If someone manufactures a 12 outboard what are y'all going to call it? A-?

How about 1/2A? David Hall holds the NAMBA 1/2A Tunnel straightaway record at 36 mph. Personally, I think letter designation for engine size is confusing. IMO, both model boating organizations should go metric - 3.5cc, 7.5cc,11cc, 15cc, whatever the metric size/s for gas engines. I rather doubt that you've ever told an interested spectator that the O.S. Outboard on your Lynx was a "B Sport" size engine. You probably told that spectator the engine was a .21 ci since who understands metric anyway? Jeez, this "Stay Home" is driving me crazy. And, that drive is getting shorter every day. Well, guess I've screwed up this thread enough for one post.
JD