[NSRCA-dist8] Redmond

[J N Hiller]

OK guys, here's the rest of the story. First the pump activating tubing, it
came with the pump from Perry, I believe it is about 1/16 ID vinyl. I pulled
the motor and changed it and while I had the motor out I disassembled and
flushed both the carb and needle valve assemblies, both direction of flow,
using my fuel transfer pump. It still doesn't get sloppy rich but it cooled
the high speed off substantially. It now runs somewhat richer discharging
light brown oil from the pipe with a 1 3/4 open needle valve. It flows a
good stream of oil vapor on long verticals now and is much happier running a
1 1/2 turn open needle valve. I set the pump back to near the factory
setting of about .110" set screw height. Which may be a little lean so I
opened it a quarter turn when I got home. The idle screw is near 3 1/2 turns
in from flush. This engine has a lot of miles on it and probably could use a
new piston ring, which is on order.
I can now get back to trying to optimize the pipe length running the heavy
wood Xoar 18-10 prop. Heck somebody needs to use a wood prop.
See you in Redmond.
Jim


-----Original Message-----
From: nsrca-dist8-bounces at lists.nsrca.org
[mailto:nsrca-dist8-bounces at lists.nsrca.org]On Behalf Of Rex
Sent: Tuesday, June 21, 2011 4:45 PM
To: AK, ID, MT, OR, WA, WY
Subject: Re: [NSRCA-dist8] Redmond

Are you using the little red tubing?  I tried fuel tubing and that doesn't
work.. it pulses and depletes diaphragm action.  I bet a new tube fixes the
problem.

J N Hiller <jnhiller at earthlink.net> wrote:

>I've blown through the system from the tank vent line and fuel flows freely
>everywhere. I've got one more thing to try and it's a long shot. The pump
>activating tube is partially kinked near one end where it bends. It seams
>logical to me that this partial restriction could dampen the operating
>pressure pulsation at high frequency / RPM leaving it unaffected at low
>through mid RPM. I need to drop the header and pull the motor to attach the
>pressure tube to the backplate screw nipple. I almost did it yesterday but
>though I'd just do one thing at a time.
>The pressure tube needs to be changed anyway as it has hardened and doesn't
>grip the ends well, probably an incompatibility with the synthetic oil in
>the fuel. It stays on but how long is uncertain and I don't like having
>problems in the starting box. E-power seams more compatible with a fuel-it
>and fly-it concept. When an airplane leaves my shop it shouldn't need
>anything more than a battery replacement in 4 or 5 years. Anything less is
>only tolerable.
>Later
>Jim
>
>-----Original Message-----
>From: nsrca-dist8-bounces at lists.nsrca.org
>[mailto:nsrca-dist8-bounces at lists.nsrca.org]On Behalf Of Rex
>Sent: Monday, June 20, 2011 9:26 PM
>To: AK, ID, MT, OR, WA, WY
>Subject: Re: [NSRCA-dist8] Redmond
>
>Hmmmm... sounds like it may be a little deeper problem.  Same fuel as last
>used in that engine?  Sounds like an obstruction.  I'm thinking it might
>have something in the high speed jet....like a really small sliver of
grass.
>I've seen that before...backflush the spray bar with both jets out.
>
>J N Hiller <jnhiller at earthlink.net> wrote:
>
>>Hay Rex, no joy on the pump change, acted the same. Running the needle 2
>>turns open is acceptable , for now but 3 turns results in no perceptible
>>change. An F plug tolerates the rich transition better than a #8 but runs
>>about 150 RPM less on the ground. Removing the extra head shim didn't
>change
>>it noticeably. The #8 with the same needle setting and extra head shim
>>really gets with it but runs hotter than I like, but you don't have these
>>problems or compromises. All you need is a Honda generator and a couple
>>extra batteries. Sounds simple to me and I like simple.
>>Jim
>>
>>-----Original Message-----
>>From: nsrca-dist8-bounces at lists.nsrca.org
>>[mailto:nsrca-dist8-bounces at lists.nsrca.org]On Behalf Of Rex
>>Sent: Monday, June 20, 2011 5:52 PM
>>To: AK, ID, MT, OR, WA, WY
>>Subject: Re: [NSRCA-dist8] Redmond
>>
>>Now you're getting it!  :-)
>>
>>J N Hiller <jnhiller at earthlink.net> wrote:
>>
>>>I'm liking not having to mess with stuff. Just plug in the battery and
>>>throttle up.
>>>
>>>