Richard,
I've been following the Posa carb posts and I'm not sure if this suggestion has been introduced yet. Make sure that the range of travel on your mixture control arm is greater than 90 degrees, just as it shows in the setup instructions. I made a small adjustment to mine and it made a huge difference. Just something to look at....and I hope that I'm not repeating someone elses suggestion. Dave Dugas

richard <tbatch2000@...> wrote:
Peter,
I have confirmed no restiction to the carb, when I get it to 2650 its
3/4 throttle and just falls off as it is getting to much or not
enough gas,no back firing or anything.I have a guy sending me a carb
to try hopefully this will help out.
Thanks
Rich
If you think of anything let me know ... Thanks





--- In Q-LIST@..., "Peter Harris" <peterjfharris@b...>
wrote:

Richard,
My Revmaster made 2850rpm static with a Cowley 56x49pitch prop.

(but I am not sure if it had the 75HP larger valves).Yours should go
faster. Have you confirmed no restriction in fuel flow to the carb?
How does it breakdown,/ missfire? (ignition) backfire?(lean),hunting?
(too rich) or just level out at 2650?(linkage held up)

Peter
----- Original Message -----
From: richard
To: Q-LIST@...
Sent: Tuesday, June 28, 2005 1:22 AM
Subject: [Q-LIST] Posa carbs


Hello Fellas,

It's me again, I've been trying to still get static rpm in my q-

2.

I've check the compression #1 has 160 #2 has 172 #3 has 140 #4

has

170. I have set the valves to .006. I have re checked the timing

its

right on. I have checked the prop its a cowley 45p 56 dia. I've

had

a local gentleman that has only run rev master's to come to look

at

it he has told me that it has not got a big enough carb(34 mm).

The

engine is a 21oo d rev master. So I went to sonex today and the

guy

there said I had to big of a carb and that on the aero V engines
which are 80 cc bigger there running a 32 mm carb and mine is a

34

mm carb. The engine will run up to 2650 rpm which is 3/4 throttle
and after that she falls on her face.Its like its either getting

to

much or not enough fuel. I'm at a loss here and dont want start
speculating and buying parts that I dont need! The other

suggestion

from sonex was to limit the throttle at 2650, I dont know if that
would be a good Idea or not, I surely don't want to find out in

the

air that it wasn't a good idea! I have another carb coming to try
hopefully it will be here today or tommorow but At this point I'm
thinking its not the carb. I'm in need of some good advice for

the

engine. I'm surely not going to take advice from someone who is

more

interested in my wallet then what is actually going on. PLEASE

HELP!!

THANKS

Rich
N169TB
Stranded in Oshkosh




Quickie Builders Association WEB site
http://www.quickiebuilders.org





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