Outboard Pipe

[C.G.]

Guys,

I have a K&B 13.33 cc outboard that I run on my deep-vee when the water is too rough for my tunnel . The problem is that the engine is so loud. I was wanting to add a tuned pipe and muffler. Does any one know where to find a pipe for this older engine?

Thanks

 

[MarkScott]

I've got an Irwin 11cc (that is what I was told it was :lol: ) that I'll be happy to part with.. Two problems, it's only the pipe - no header, the other is which box did it get put into .. If you are interested, let me know. I'll dig it out and take a pic.

Mark..

 

[Foolwitools]

Hi!

You can get an aluminum header from 707 specialties, and if you talk to Jimmy E.(Irwin Pipes) real nice He will make one. I just got one a few months ago.....

Bob the Fool :blink:

 

[jydracing]

i havt the headers here for the 13 cc they run 25.00 plus shipping just let me know. jimmy

 

[MarkScott]

Found it, or should I say them... 2 different ones to pick from. $50 for either and I'll toss in shipping within the cont. US.

Mark...

 

[C.G.]

OB nut,

I might be interested one of your pipes. I do have a question about the size difference between the two. Can two pipes so different in size be for the engine? If so would there be an advantage to either?

C.G.

 

[MarkScott]

CG, well, I'll be honest, I'm not an expert to tell you what the difference might be for either style. I've not had a chance to run either of these pipes on my 11cc and 13cc motors. In past discussions with others, I know of one that runs a 7.5cc pipe on his 11cc motors. So it may just be personal preference as to what is run.

I attempted to measure the volume of each pipe. The Irwin holds 200 +/- ml of h2o. The other, Silver Bullet maybe?, hold just over 200 ml of h2o. Other specifics: the Irwin has an inlet ID of .800 and exit (sleeved down) ID of .340; the other has an inlet ID of .614 and exit ID of .400.

Hopefully others can assist as to which might be a better pipe. I'd go out on a limb and think the Irwin might be the better choice as it has a larger inlet and a smaller outlet.

Hope this helps out.

Mark......

 

[jydracing]

in the pic of the two pipes togather the top one is the older irwin and the bottom one it the aerotec 7.5 pipe hope this helps jimmy

 

[james irwin]

in the pic of the two pipes togather the top one is the older irwin and the bottom one it the aerotec 7.5 pipe hope this helps jimmy

86884[/snapback]

​

JIMMY . YOU ARE ABSOLUTLY RIGHT

 

[MarkScott]

Jimmy, thanks forgot what make that pipe was.. h34r:

Mark.

 

[C.G.]

in the pic of the two pipes togather the top one is the older irwin and the bottom one it the aerotec 7.5 pipe hope this helps jimmy

86884[/snapback]

​

I guess I don't understand, can I run a 7.5 pipe on a 13.3 engine. I came from a dirt bike background and you needed to run a pipe sized for a specific engine size. Does the same apply to these little "two-strokes"?

 

[jydracing]

hi cg that is hard to say. sometimes it works and sometimes it does not. it depends on the way the engine is modded and the hull setup

 

[joe707monohan]

Guys,
I have a K&B 13.33 cc outboard that I run on my deep-vee when the water is too rough for my tunnel . The problem is that the engine is so loud. I was wanting to add a tuned pipe and muffler. Does any one know where to find a pipe for this older engine?

Thanks

sorry i just seen this is 2005 .

joe

[email protected]