RunRyder RC
 0  Topic Subscribe
WATCH
 1 page 675 views
HelicopterEngines Plugs Mufflers Fuel › YS80 wrist pins?
04-27-2002 06:58 PM  15 years agoPost 1
gforce

rrVeteran

Fort Mill, SC

My Posts: All  Forum  Topic

What is this I hear about wrist pins comming off on the ys80? Has there been alot of engines with this problem? I bought one from cyberheli a few weeks ago, and it had the extended barrell. Sent that in and got it replaced, but this is the first I have heard about wrist pin problems. Do I need to send the engine in for repairs? Have not installed it yet, it is still nib.

PM  EMAIL  GALLERY  Attn:RR  Quote
04-27-2002 07:58 PM  15 years agoPost 2
furyextreme

rrApprentice

USA

My Posts: All  Forum  Topic

take piston out and make sure the wrist pin retainers are cut (the part you grab with needle nose pliers)if they are not you could do it yourself very easy make sure you leave enough to grab on too.
all new engines have it done all ready,even with the old barrel

PM  EMAIL  Attn:RR  Quote
04-27-2002 08:42 PM  15 years agoPost 3
gforce

rrVeteran

Fort Mill, SC

My Posts: All  Forum  Topic

Well I have removed the piston, and the retaining clips are the shape of the letter G. And there is about an 1/8 to 3/16" gap between the ends of the clips. Is this right?

Im not sure I totally follow you on the part you should cut if it is wrong.

The part you would grab with needle nose pliers is about 1/8" long.

Im also glad I took it apart, there were little tiny particles (coulden't tell if they were metal or not) in between the sleve and cylinder head. I am going to totally clean this baby out before I re assemble.

And by the way, does the little dot on top of the piston go towards the exhaust port? I took it apart to quickly to notice until after it was out.

PM  EMAIL  GALLERY  Attn:RR  Quote
04-27-2002 11:57 PM  15 years agoPost 4
Dr.Ben

rrMaster

Richmond, VA, USA

My Posts: All  Forum  Topic

Dot goes opposite the exhaust port and marks the position of pin which keeps the ring from rotating about its groove. I think it falls at about 10 o'clock if the exhaust port is at 6 o'clock.

Upon assembly, it will become obvious which was it should go, because if that point is not in an area free of porting, the ring edge will stick out, hang in the port, and ruin the ring (and a lot more, too).

Ben Minor

PM  EMAIL  GALLERY  Attn:RR  Quote
04-28-2002 01:17 AM  15 years agoPost 5
furyextreme

rrApprentice

USA

My Posts: All  Forum  Topic

does the wrist pin retainer look like it was cut?
it originally would be at least half way up the pin but if it just barely where you can put needle nose on it than i would say it was done at the factory.
lookinf fron the top of the piston just make sure the pistin ring pin(dot) is not in any port window

PM  EMAIL  Attn:RR  Quote
04-28-2002 01:30 AM  15 years agoPost 6
gforce

rrVeteran

Fort Mill, SC

My Posts: All  Forum  Topic

The pin is just barely where you could grab it with needle nose. I emailed ys perf and they said they only had a handful go bad out of hundreds and not to worry about it. Looks like I will be ok. I thoroughly cleaned the engine, put it back together (making sure I got the ring lined up in the proper place) and put oil to lube it. When I saw posts about taking a new engine apart and checking it for debris, I didn't believe it. But after taking mine apart and seeing some debris in a brand new ys for myself, I am glad I did.

Hey, thanks again for your help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 675 views
HelicopterEngines Plugs Mufflers Fuel › YS80 wrist pins?
 Print TOPIC  Make Suggestion 

 0  Topic Subscribe

Monday, December 18 - 2:55 pm - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online