Carb Cleaning, the proper way?

Chrisravosa36

Chief Petty Officer
Joined
Aug 16, 2015
Messages
622
Quick question, not trying to steal your thunder here. I have carb cleaner and chemdip parts cleaner, should you rebuild the carb first, all the new floats, needles seals, then clean it with the spray, then leave it in the parts cleaner? Just wanted to know the right way to do it.
 

gm280

Supreme Mariner
Joined
Jun 26, 2011
Messages
14,605
Chris, usually folks completely disassembly the carb after removing it from the engine of course. And that means totally disassembly if you are serious about rebuilding it. Then soak it in carb cleaner per instructions if that is how you want to go. Some use carb spray cleaner and spray each part with it if they don't soak it in carb cleaner. You choice there. Verify all the holes and passages are clean and clear. You can take one strand from a piece of stranded wire and use it to make sure the holes and passages are open. Even use compressed air which really helps. Once it is cleaned via soaking or spraying, then make the initial setting for float level and bleed screws (if applicable) and reassemble it per carb kit instructions, or better yet, a manufacturer's model, year, HP specific shop manual. Buy one if you don't already have one. It will save you time and money. You are ready to install it back on the engine, connect it up and go again. JMHO!
 

oldboat1

Fleet Admiral
Joined
Apr 3, 2002
Messages
9,612
^^^agree. Disassemble and clean first. Should be ready to go after reassembly with new parts.
 

emdsapmgr

Supreme Mariner
Joined
Dec 9, 2005
Messages
11,551
Once completely disassembled, I pick up one carb, then squirt Gumout down one of the passages in the carb. Note the outflow volume of the carb cleaner out the other end of the hole. The pick up carb 2. Spray in the same hole, again observing the outflow from the other end of carb #2. Your objective is that all outflows on similar passages flow the same. You'll see a difference in the flow if one is restricted and needs additional cleaning. Do this for all holes, one hole at a time, comparing against the other carb(s). Make sure the all the jets come out and that you visually check them for debris prior to re-assembly. You have to use a cleaner that will dissolve dried fuel gel-not all cleaners do..
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
52,300
Be careful with shop air and small carb parts. Had to replace a garage window when I blew the secondary jet out of my fingers. Never did find the jet
 

HighTrim

Supreme Mariner
Joined
Jun 21, 2007
Messages
10,486
I use Pine Sol now as my soaking mix. The wife likes the smell better, and I do a lot, so trying to save my skin a little.

I soak them overnight. Then take out, and wash in hot soapy water. Blow dry with compressed air. Then I shoot carb cleaner or the like through all passages, to ensure clear. Then blow with compressed air again. Then rebuild.
 

gm280

Supreme Mariner
Joined
Jun 26, 2011
Messages
14,605
Be careful with shop air and small carb parts. Had to replace a garage window when I blew the secondary jet out of my fingers. Never did find the jet

I basically did blow a really tiny little jet away somewhere in the yard one day doing the same thing. I didn't realize that little brass looking spot in the leaf blower carb was a jet until it made left off. I heard of finding a needle in a haystack, but a 3/32" round jet in the fall leaves, never! I had to buy a new one. And I think they had to actually make one little jet, it took so long to get. :facepalm:
 

Chrisravosa36

Chief Petty Officer
Joined
Aug 16, 2015
Messages
622
Thanks for all the help! I just have heard so much from so many diff people I wanted to know what is the most effective way.
 

gm280

Supreme Mariner
Joined
Jun 26, 2011
Messages
14,605
Chris, when asked a question on these forums, folks will offer their ideas to their best way. No one is better or worst then any other way. So you have to make your decision on how you want to go. Realize that whatever idea you chose, the objective is to get the carb clean clear and working. And however you do that is what really counts. So remove, disassemble, clean and reassemble is the basic steps to any carb rebuild. JMHO!
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
52,300
and dont go launching small carb jets into the lawn or thru the garage door window :facepalm::D:pound:
 

gm280

Supreme Mariner
Joined
Jun 26, 2011
Messages
14,605
and dont go launching small carb jets into the lawn or thru the garage door window :facepalm::D:pound:

Scott, one day when I do decide to clean my shop out and get into every corner as well to clean, there is no telling what little parts I will find that I blew all over the place with COMPRESSED AIR. I bet your window shattering was interesting to say the least. And I am not laughing at you, but hopefully with you on that one. It sure sounds like something I would easily do. :pound:
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
52,300
laugh.... I did. luckily it was a holley jet and I could get a replacement from my performance automotive store that day.

Anyone that works on things have memories of little oops and mishaps.
 

lmuss53

Lieutenant Junior Grade
Joined
Sep 9, 2008
Messages
1,227
Those small cans of "canned air" used for electronics come in handy for carb cleaning. Be careful how you hold them, some of them are designed to dump raw freon or whatever the liquid is out when they are upside down, to freeze components.
 

tommarvin

Ensign
Joined
Nov 22, 2015
Messages
999
This is the funniest thread I have ever read , and now I know how to clean a carb correctly. Thanks.

Free factory service manuals at www boatinfo.no/lib/library.html. click your make, find your motor, take care you guys.
 
Top