Like Tree2Likes

Spark plug look ok?

Old 12-04-2020, 09:09 AM
  #16  
Tech Adept
 
Join Date: Apr 2015
Location: Long Island NY
Posts: 154
Default

Spark color to me is more for fine tuning. Checking color after a gurgle really shouldn't be apart of the trouble shooting process. Change to a fresh plug once you have your tune semi dialed then check color for adjustments.
Lone Racer is offline  
Old 12-04-2020, 09:23 AM
  #17  
Tech Apprentice
Thread Starter
 
Daksh's Avatar
 
Join Date: Nov 2020
Location: Southern California
Posts: 99
Default

It does not look like the truck is running a fuel clunk, I donít see one in the tank, I donít really know how the truck was ran with the last guy, the truck had 9 hours, he never cleaned the filter, he just kept leaning his settings
Daksh is offline  
Old 12-04-2020, 09:25 AM
  #18  
Tech Apprentice
Thread Starter
 
Daksh's Avatar
 
Join Date: Nov 2020
Location: Southern California
Posts: 99
Default

https://drive.google.com/file/d/1pBn...w?usp=drivesdk
Daksh is offline  
Old 12-04-2020, 09:25 AM
  #19  
Tech Apprentice
Thread Starter
 
Daksh's Avatar
 
Join Date: Nov 2020
Location: Southern California
Posts: 99
Default

https://drive.google.com/file/d/1XY3...w?usp=drivesdk
Daksh is offline  
Old 12-04-2020, 09:26 AM
  #20  
Tech Apprentice
Thread Starter
 
Daksh's Avatar
 
Join Date: Nov 2020
Location: Southern California
Posts: 99
Default

Looks like i now have enough posts to put links
Daksh is offline  
Old 12-04-2020, 09:32 AM
  #21  
Tech Adept
 
Join Date: Apr 2015
Location: Long Island NY
Posts: 154
Default

Please don't worry yourself with that plug lol. Been there when I first started and it will lead you to frustration. I'm gonna say dive in and order up a set of gaskets for the motor, new ring, and carb rebuild kit or just plain buy a WT990. Open her up and you will learn a lot. Look for scoring in the cylinder, mangled gaskets and dirt. I'm almost 100% the carb is dirty if there was no clunk. Get one of those too!

Lone Racer is offline  
Old 12-04-2020, 09:37 AM
  #22  
Tech Apprentice
Thread Starter
 
Daksh's Avatar
 
Join Date: Nov 2020
Location: Southern California
Posts: 99
Default

Looks like Iíll be doing some wrenching then, Iím pretty sure itís just the carb gasket that blew out, would a compression tester help?
Daksh is offline  
Old 12-04-2020, 09:41 AM
  #23  
Tech Adept
 
Join Date: Apr 2015
Location: Long Island NY
Posts: 154
Default

Naa, don't bother with that. Your hand is your compression gauge. You should have to stand on one wheel and yank when compression is good. If you can pull with the flick of your wrist that means you need a new ring or top end, usually just a ring.


Yeah start with the fuel clunk and carb or carb gaskets first. And for your piece of mind a new plug lol.
Lone Racer is offline  
Old 12-04-2020, 09:44 AM
  #24  
Tech Adept
 
Join Date: Apr 2015
Location: Long Island NY
Posts: 154
Default

Just know if you re-ring your gonna have to break in the motor. Let it drink a quarter to half tank at idle.
Lone Racer is offline  
Old 12-04-2020, 09:45 AM
  #25  
Tech Apprentice
Thread Starter
 
Daksh's Avatar
 
Join Date: Nov 2020
Location: Southern California
Posts: 99
Default

Lol, the pull starter does lift the truck, I have to hold it down to start it
Daksh is offline  
Old 12-04-2020, 09:46 AM
  #26  
Tech Adept
 
Join Date: Apr 2015
Location: Long Island NY
Posts: 154
Default

Then there you go. Now just remember when it get's easier to pull that means your ring is wearing. They are only $6
Lone Racer is offline  
Old 12-04-2020, 09:46 AM
  #27  
Tech Apprentice
Thread Starter
 
Daksh's Avatar
 
Join Date: Nov 2020
Location: Southern California
Posts: 99
Default

How do I know if it needs a new top end or just a ring? How often do you re ring?
Daksh is offline  
Old 12-04-2020, 09:50 AM
  #28  
Tech Adept
 
Join Date: Apr 2015
Location: Long Island NY
Posts: 154
Default

I re-ring, change gaskets and clean/rebuild carb every season. Cheap insurance in my mind. When you feel a loss of compression you will obviously open her up. If you see major scoring/scratches in the cylinder then you'll need a new head kit, if there isn't anything majorly scratched you can re-ring.... I'm waiting on a couple of rings right now for my 27.2cc, the cylinder shows some scoring but should be fine. I'll post up a pic of the head I'm working on so you have better idea.
Lone Racer is offline  
Old 12-04-2020, 09:54 AM
  #29  
Tech Apprentice
Thread Starter
 
Daksh's Avatar
 
Join Date: Nov 2020
Location: Southern California
Posts: 99
Default

Is there a method to checking air leak like we used to on the nitro engines, shooting nitro cleaner at where the suspected leak is and seeing if there was a change in rpm, Iím kinda suspicious that the insulator block is cracked
Daksh is offline  
Old 12-04-2020, 10:13 AM
  #30  
Tech Adept
 
Join Date: Apr 2015
Location: Long Island NY
Posts: 154
Default

Not that I know of. These motors are nowhere near as finicky as the nitro's. They should hold a tune until you change gas or oil mixture. Of course if you tune in summer it's gonna want different settings in the fall/winter. Typically if I experience your issues it's a gasket somewhere or dirty carb.

Here is a photo of my 27.2cc that I'll be re-ringing soon. This will be the last refresh for this top end I think. Notice the scoring lines. They aren't too bad but that is the beginning of the end for a cylinder. If you can get a finger nail into one of those grooves than it's prob time for a new head.





Lone Racer is offline  

Thread Tools
Search this Thread

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

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.