CMB rs .21

[anthony_marquart]

Hey Guys,

I picked up CMB RS21,.. I know this isn't the latest and greatest by any means but do you guys have tips to get it running well.

Pipe is AB Parabolic,.. most likely run the new GR 50% fuel,.. prop suggestions? pipe length?

Also I need a remote needle,.. any one have one they want to get rid of?

 

[julianconde]

pipe lenth 7 1/4 will scream, 1445 with 3.2" to 3.4" pitch. H-4s and 46 mm dia H-7s with 3.2- 3.5 cup will work well with 60% fuel

trial and error my friend

 

[carlnoki]

Anthony;

I have never run the AB Parabolic pipe, but you can try to set it at around

31/4 to 33/8 inches to start with. (measured from the center of the motor even with the

glow plug straight back along side to the high point (weld) on the pipe.)I am also guessing you are talking

about the motor that uses the 180 degree header. Some folks refer to the

Valvola as an RS at time also.

set the head clearance to around .006-.007".

prop to start with ABC 1714 and 1716.

These are only suggestions to try to get your boat running then you can start working

on the set up and pipe/prop selections and such after that.

Carl