Notices
YS Engines Support Direct support from YS Performance Engines by Dave Shadel

YS leaking fuel from the carb

Old 01-26-2004, 07:05 PM
  #1  
Wolfpack
Member
Thread Starter
 
Wolfpack's Avatar
 
Join Date: Dec 2003
Location: Huntington Beach, CA,
Posts: 42
Likes: 0
Received 0 Likes on 0 Posts
Default YS leaking fuel from the carb

Hi Dave,

I have a new ys 110, this is my first ys engine and my first 4 stroke. I have about 1.5 gallons of 20/20 through it and also a os - F Plug. from the beginning it seems to leak fuel from the carb after shut down and while still pressurized. I broke it in with 1/2 gallon of fuel and took it to the field. I thought it seemed to be running extremely rich and a guy at the field "tuned it" for me. He said it was extremely rich and told me to turn the regulator in 1/4 turn. Before doing this he told me to seat the regulator, count the turns while turning it in all the way, then turn it back out, then turn it in 1/4 turn from there (basically bottom it out, put it back to factory settings and then turn it in 1/4). Everyone agreed it seemed very rich at factory settings, even spitting fuel out the carb while running. Turning the reg in 1/4 seemed to help. He then turned the low speed out for a total of 3 turns and high speed at 1.25 truns (I was very concerned we were out this far from factory settings. I then put the engine on the plane and took it to the field. Although it drips fuel after being shut of, it showed characteristics of running LEAN. I would run it up and after bringing it down it would increase idle about 200-300 rpm. SO I turned the low speed to about 2 turns out and the hi speed about 1.5 turns out.

After richening it out, and the plane seems to run fine in the air except:

1. after idleing for 15 seconds and then increasing throttle you can see a pretty good stream of exhaust come out for 3 seconds or so.

2. I have the engine richened 400 rpms from max, and I get about 9000 rpms (max) and I am running at 8600 RPMS after backing off the mixture on a 15x8 prop. but the engine will not really idle very good at 2000, and sometimes dies.

3. The carb still drips fuel after shutdown while engine is under pressure.

4. I do not get any change in RPM by changing the low end needle valve setting while idling at 2300 rpm (changing the needle valve from 3 turns out to 1.5 turns out).

5. I need a new exhaust tube (I cut the factory supplied tube and added a my own tube extension, but I want to go back to factory exhaust) where can I buy one in the 92649 area code, somewhere close to huntington beach, CA?

I love this engine, it really performed EXTREMELY well on the vectorflight 66"extra, WOW it just seems to be perfect for this plane, I will probably buy quite a few YS engines going foreward, the performance jsut ROCKS, but I need to understand what is going on here.
Old 01-26-2004, 09:46 PM
  #2  
Dave Shadel
Senior Member
 
Join Date: Apr 2002
Location: Gardnerville, NV
Posts: 5,385
Likes: 0
Received 0 Likes on 0 Posts
Default RE: YS leaking fuel from the carb

Try the setup proceedure at www.ysperformance.com. If it doesn't work properly after that, we will need to see it.

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.