Notices
Car Nitro & Gas Engines Discuss all aspects of Nitro and Gas rc car engines here!

How do I fix a gummed up motor?

Old 03-02-2010, 10:44 AM
  #1  
Bacchus
Junior Member
Thread Starter
 
Join Date: Jun 2003
Location: LA
Posts: 23
Likes: 0
Received 0 Likes on 0 Posts
Default How do I fix a gummed up motor?

Well since spring is almost upon us I decided to clean up the ole HPI Savage 21. Tried pulling the starter rope and it would not budge. Guess I didn't do a good job of cleaning it up last time I ran it. So how do I get this motor running again or can I even?

What i have done so far:

Took pull starter off and engine back plate. Took head off and carb off.

Hosed it down with WD-40 and got it loosened up pretty good. The slide on the carb is also very sticky.

Do i just need to hose it down with carb, break, or engine degreaser?

Any chance i can get it running again to those who have had this problem or do i just need to buy a new motor?

Thanks!
Old 03-02-2010, 11:27 AM
  #2  
proanti1
Senior Member
My Feedback: (2)
 
proanti1's Avatar
 
Join Date: Dec 2004
Location: Boerne, TX
Posts: 4,299
Likes: 0
Received 0 Likes on 0 Posts
Default RE: How do I fix a gummed up motor?

Go to the nearest hardware store, buy a thing of mineral spirits, take the backplate off the engine, soak the entire engine in the mineral spirits for a few hours. Works for me every time, even on the most gummed up of 4 strokes.
Old 03-02-2010, 08:43 PM
  #3  
RC Panda
Senior Member
 
Join Date: Jan 2010
Location: Australia, AUSTRALIA
Posts: 165
Likes: 0
Received 0 Likes on 0 Posts
Default RE: How do I fix a gummed up motor?

Apparently Just chuck in a bucket of alcohol.
Old 03-02-2010, 10:14 PM
  #4  
PrjctStrtFrce
Senior Member
My Feedback: (10)
 
PrjctStrtFrce's Avatar
 
Join Date: Aug 2005
Location: Bartlett, IL
Posts: 2,948
Likes: 0
Received 0 Likes on 0 Posts
Default RE: How do I fix a gummed up motor?

A small cup filled with nitro, just enough to soak the entire motor.
Old 03-03-2010, 08:53 AM
  #5  
Hoese37
Senior Member
 
Join Date: Oct 2005
Location: Silver Lake, MN
Posts: 630
Likes: 0
Received 0 Likes on 0 Posts
Default RE: How do I fix a gummed up motor?

just fire it up an run it rich!
Old 03-03-2010, 10:12 PM
  #6  
rcslsafut
Senior Member
 
rcslsafut's Avatar
 
Join Date: Apr 2009
Location: american fork, UT
Posts: 946
Likes: 0
Received 0 Likes on 0 Posts
Default RE: How do I fix a gummed up motor?

alcohol is the best cleaner i have used for nitro ,as nitro IS alcohol based it breaks it down excellantlly!!!!
Old 03-04-2010, 03:52 AM
  #7  
snoking16
Senior Member
 
snoking16's Avatar
 
Join Date: Nov 2005
Location: Kenmore, WA
Posts: 2,529
Likes: 0
Received 0 Likes on 0 Posts
Default RE: How do I fix a gummed up motor?

the auto parts store sell carb cleaning kits. It looks like a gallon of pain. it comes with a strainer and you take everything apart completely, put it in the strainer and let it sit and soak in the cleaner for a while. I did this with a very old pro.15 and it cleaned everything out so good it looked like a new motor. I put it all back together soaked it with WD40 and it ran like a champ for another 6 gallons. great stuff. I use it on all my gunked up stuff. Its meant for carbs on bigger motors but works great on anything. hope that helps.

the other suggestions should also work too. pick one, go with it, and go have some fun.
Old 03-05-2010, 06:12 PM
  #8  
rccheech
Senior Member
 
Join Date: Aug 2007
Location: Roseville, MI
Posts: 1,071
Likes: 0
Received 0 Likes on 0 Posts
Default RE: How do I fix a gummed up motor?


ORIGINAL: rcslsafut

alcohol is the best cleaner i have used for nitro ,as nitro IS alcohol based it breaks it down excellantlly!!!!
Denatured alcohol does work very well, be careful with mineral spirits, it would be best to remove the bearings because the spirits could eat up the rubber seals in the bearings, especially if its out of a saftey clean tank.
Old 03-11-2010, 07:34 AM
  #9  
lez1troubles
Senior Member
 
Join Date: May 2009
Location: antwerpen, BELGIUM
Posts: 1,968
Likes: 0
Received 0 Likes on 0 Posts
Default RE: How do I fix a gummed up motor?

strip your engine and soak the pieces over night in petrol. take out the pieces one by one and clean with a tooth brush(preferably your sisters(if you have one)) or old paint brush. Spray all the parts in with WD 40 and rebuild. Dont forget to seal the back plate. Use Lock tight on the balts for the cylinder head and give it a start. Have fun and take your time.[8D]
Old 03-11-2010, 12:18 PM
  #10  
srt10
My Feedback: (20)
 
Join Date: Jan 2008
Location: Frederick, CO
Posts: 5,970
Likes: 0
Received 0 Likes on 0 Posts
Default RE: How do I fix a gummed up motor?

I once used a spray carb cleaner from the auto parts store..
I took the plug out and filled the cylinder with the carp spray, spun the crank by hand and withing seconds the gum disolved..
worked great for me
Old 03-11-2010, 09:11 PM
  #11  
Montana Mike
Senior Member
My Feedback: (1)
 
Montana Mike's Avatar
 
Join Date: Jul 2008
Location: Helena, MT
Posts: 912
Likes: 0
Received 0 Likes on 0 Posts
Default RE: How do I fix a gummed up motor?

I pull my engine apart as much as I can and throw everything into a container with Nitro fuel and let it sit for a while
then I remove the pieces, clean them off with a tooth brush. Spray everything down with Naphtha and blow off with a hose. The I lube everything up with after run oil and it is all good as gold.

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.