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Search: Posts Made By: Dave Harmon
Showing results 1 to 10 of 10
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Forum: RC Pattern Flying
07-05-2012, 06:22 PM
Replies: 249
Views: 57,513
Posted By Dave Harmon

RE: YS 170 DZ CDI

Chris....sometimes the small tab that is on the right side of the barrell will be installed crooked.
This should fit square to the groove in the barrell....also the surface of the tab is slightly...
Forum: RC Pattern Flying
02-17-2012, 03:54 PM
Replies: 249
Views: 57,513
Posted By Dave Harmon

RE: YS 170 DZ CDI

Found it....Hyperformance Products.
Great news Al......thanks man.
Forum: RC Pattern Flying
02-17-2012, 08:39 AM
Replies: 249
Views: 57,513
Posted By Dave Harmon

RE: YS 170 DZ CDI

Agreed.....but Prather has been out of business for years....and Aero-Trend that sold Blue-Line has been gone for a long time too.
Forum: RC Pattern Flying
02-16-2012, 10:30 PM
Replies: 249
Views: 57,513
Posted By Dave Harmon

RE: YS 170 DZ CDI

Topi....
I had a hellova hard time with mine......same symptoms.
When the silicone fuel line is put on the nipple sometimes a sharp corner will carve out a piece of silicone from the inside of...
Forum: RC Pattern Flying
12-31-2010, 06:20 PM
Replies: 249
Views: 57,513
Posted By Dave Harmon

RE: YS 170 DZ CDI

Hahahaha......okokokok.....I get it now!

You might check the plug gap....anything over .015" and it will start to have that rich sounding miss....much larger might cause rougher running.
Also,...
Forum: RC Pattern Flying
12-31-2010, 04:44 PM
Replies: 249
Views: 57,513
Posted By Dave Harmon

RE: YS 170 DZ CDI

Have you checked the CDI battery? When the battery gets low it will miss badly.
Probably not the problem if powered by the receiver battery.
Considering it runs ok for several minutes then goes...
Forum: RC Pattern Flying
08-28-2010, 09:56 PM
Replies: 249
Views: 57,513
Posted By Dave Harmon

RE: YS 170 DZ CDI

'PN' is pattern narrow.....'WPN' is wide pattern narrow.

EDIT:.....from the APC site....the 18.5x12WPN hub is .22 larger in diameter and .100 thicker than the 20x10.5pn.
Forum: RC Pattern Flying
08-28-2010, 08:25 PM
Replies: 249
Views: 57,513
Posted By Dave Harmon

RE: YS 170 DZ CDI

I don't see why not......just use 30% nitro fuel.
I know some guys use CP 20/20 Pro Pattern and it works fine for the smaller props but the flight performance is much better with the 20x10.5pn.
...
Forum: RC Pattern Flying
08-28-2010, 03:39 PM
Replies: 249
Views: 57,513
Posted By Dave Harmon

RE: YS 170 DZ CDI

Mike Harrison gave me a APC 20x10.5PN several months ago to try out.
I liked it better than the APC 19x11.

So....I bought several of them for use on the 170CDI and it works great.
It lowers...
Forum: RC Pattern Flying
08-24-2010, 02:28 PM
Replies: 249
Views: 57,513
Posted By Dave Harmon

RE: YS 170 DZ CDI

Adding to the heat is the lower pump pushrod in contact with the cam lobe and the bottom of the pump piston.
Also, the friction of the piston in the pump housing is causing more heat....and in my...
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