engine woes

[George Kennie]

Thanks Dave,
I was able to get their Tel.# off the web-site which puts me in great shape.

Thanks again.
Georgie

David Harmon wrote:

> Georgie....I think this is what you need.
>
> http://www.perrypumps.com/prod01.htm
>
> Dave
>
> -----Original Message-----
> From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]
> On Behalf Of George Kennie
> Sent: Friday, November 15, 2002 8:33 PM
> To: discussion at nsrca.org
> Subject: engine woes
>
> I purchased an MDS-58 in the spring for my Javelin after purchasing one
> at the WRAM show. I selected the MDS because it's almost a 60 in
> displacement, but is housed in a small case making it quite light for
> the power output. In it's original configuration it had serious
> carburetion problems. Subsequent visits to the local hobby shop
> disclosed that they were shipping newer releases with a second
> generation carburetor touted as the "C2". Being frustrated with the
> performance I was receiving I called the distributor and was advised to
> return the engine and they would make it right."Wow!, great service,
> eh?"  Well 3&1/2 weeks later I received the engine back with the new
> "C2" carb installed. The new unit was about 1/3 larger than the
> original, requiring additional cutting of the cowl.Early flights were
> not perfect which I attributed to the fact that I had left the
> adjustments as set by the distributor, which they recommended.
> Subsequent flights only went downhill. Yesterday I decided that I was
> going to concentrate on getting this engine finally adjusted correctly.
> Off to the field I go and get everything set up." First I'm going to get
> that low end spot on and get rid of that hesitation". Fuel it up, turn
> it over a couple of revs while choking and yup it's drawing fuel. Attach
> the igniter and spin it over with the trusty Kavan and
> rrr,rrr,rrr,rrr,rrr,rrr,rrr,rrr,rrr ,.....man, is this thing ever going
> to fire? Try a different plug! rrr,rrr,rrr,rrr,rrr,rrr,rrr,sput,sput,
> vroom(not a big vroom, I'm just off idle). Anyhow, I finally got it
> going enough times to finally adjust the low end where it would hold
> idle for a full minute at about 2K rpm and cleanly transition to full
> power and do it consistantly.Aha, I finally got this buggar clicking!
> O.K., now I'm going to fly this bird so I proceed to taxi out to the
> center of the runway(which takes a few bursts to 1/2 throttle)and
> advance to full and the son-of-a-gun quits dead! Stick it back on the
> bench and restart it and it still transitions faultlessly from idle to
> full power. Go to 1/2  throttle or just a whisker below and it will run
> about 20 seconds and abruptly quit. Play around some more and I finally
> get it to run at 1/2 throttle for an extended period of time,but now,
> when I go from 1/2 to full it quits about 2 clicks short of full
> power.Decided that maybe the pressure is too high causing it to load up
> at mid-range so I disconnect the pressure line and try it again. The
> only difference is that now the high speed needle is very insensitive,
> but all the same conditions still exist.
>
> I can only conclude that the carb design is faulty and would warn
> prospective buyers to proceed with caution. I had previously(about a
> month and a half ago) installed a carb from a ST-40, which is a perfect
> fit, and the engine ran well. I think what I might do is try a Perry,
> but I need some help with the Web-site. Can someone help me with that? I
> think Varsane sold out to someone named Conelly or something like that.
> Thanks for listening to my tale of woe. Georgie
>
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