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08-12-2007 07:12 PM  10 years agoPost 1
T 3d

rrApprentice

Boston Mass

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Whats guys i need to purchase a new engine i have a ys91 st and it will not start at after 20 flieghts on it so i give up i change the glow plug i put the needles to factory settings but nothing but when it was running i had to ajust the needles every weekend it was to much problems so i give up i think i want a OS but which one the price is not a problem i want the newest badest one out there .

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08-12-2007 07:15 PM  10 years agoPost 2
cdrking

rrElite Veteran

Seattle

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Maybe you should figure out why your YS91 won't work. It's a great engine and has excellent power. Maybe it was a lean run and cooked the engine. Have you taken it apart and looked at the top of the piston and the liner?

YS engines are known for their set it and forget it needles settings. It shouldn't take much tweaking after it's set correctly.

Jeff

To hover is divine, the alternative is rather PLANE.

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08-12-2007 07:23 PM  10 years agoPost 3
T 3d

rrApprentice

Boston Mass

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ys

i am looking at the top know it is a brown golden color some areas a little dark but not much

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08-12-2007 07:25 PM  10 years agoPost 4
cdrking

rrElite Veteran

Seattle

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Can you post some high quality pictures? Also is the liner scored, (does it have vertical lines in the metal)?

Jeff

To hover is divine, the alternative is rather PLANE.

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08-12-2007 07:40 PM  10 years agoPost 5
T 3d

rrApprentice

Boston Mass

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ys

not set up for pic but i do have vertical scor but it is so minar i can not feel them whith my fingre

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