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Motorcycle Forum / Country Specific / UK Group / April 2008Carb cleaning ?
I have a carb that seems to have had fuel evaporating in / throughout it for some considerable time and needs a good clean-out - I imagine it has lacquer or similar in the jets and casting passageways.. it won't run above idle, sounding like fuel starvation Any recommended products / chemicals I can flush through to clean it out ( I have xylene and acetone) or is any carb cleaner as good as anything ? Thanks, Nick > Any recommended products / chemicals I can flush through to clean it > out Petrol will clear old petrol deposits, but this would involve taking out the jets and emulsion tubes and soaking them in a jar or something - guessing by your post though you are not looking to do this. If the carb has been sitting with petrol in it, it is likely there will be deposits around the carb needle and possibly in the emulsion tube, if it's just the carb needle then you will atleast need to get to it from the airbox end to spray on the carb cleaner - assuming it is a CV type carb then see if you can lift the piston, it might be being starved of fuel as the desposits are holding the needle in the emulsion tube and stopping it rising. If there are no deposits on the needle then you will be looking at stripping the carb to soak the jets. HTH > Petrol will clear old petrol deposits, but this would involve taking <snip stuff> IME it doesn't. Depends how old the deposits are probably. I've yet to find a decent chemical that will shift it easily. Ultrasonic cleaner deffo shifts the green gunk, but I've yet to find a reliable way to clear out the maze of twisty little passages (that are all alike)  Signature/Simon > > Petrol will clear old petrol deposits, but this would involve taking > <snip stuff> [quoted text clipped - 5 lines] > the green gunk, but I've yet to find a reliable way to clear out the > maze of twisty little passages (that are all alike) Spray gun cleaner certainly shifts any crap in the carbs but it will also f.ck any plastic parts so you really need to strip them down if any little passages are blocked A mate used to swear by caustic soda as well but he was a bit of a nutter -- Thanks for the replies.. - I have stripped the carb down to as many parts as it will go down to, and cleaned out with petrol - there was a bit of dirt in it, but mainly from the outside - anyway it didn't run any better afterwards so I feel sure its within the jets / passageways.. I'll do it again with acetone / xylene as I know that is what is in one carb cleaner after removing the float assembly and needle valve Thanks, Nick On 30 Apr, 13:23, "steve robinson" <st...@colevalleyinteriors.co.uk> wrote: <snip> > A mate used to swear by caustic soda as well but he was a bit of a > nutter Is that because Caustic Soda dissolves aluminium and you buy a new set to replace the now missing ones? Steve > On 30 Apr, 13:23, "steve robinson" > <st...@colevalleyinteriors.co.uk> [quoted text clipped - 8 lines] > > Steve Quite !! Nick > On 30 Apr, 13:23, "steve robinson" <st...@colevalleyinteriors.co.uk> > wrote: [quoted text clipped - 5 lines] > > Steve wouldnt know , as i said he was a bit of a nutter used to flush his engine out with parrafine as well -- >> Petrol will clear old petrol deposits, but this would involve taking > <snip stuff> [quoted text clipped - 5 lines] > green gunk, but I've yet to find a reliable way to clear out the maze of > twisty little passages (that are all alike) Is it dark? SignatureCatman MIB#14 SKoGA#6 TEAR#4 BOTAFOF#38 Apostle#21 COSOC#3 Tyger, Tyger Burning Bright (Remove rust to reply) 116 Giulietta 3.0l Sprint 1.7 145 2.0 Cloverleaf 156 V6 2.5 S2 Triumph Sprint ST 1050: It's blue, see. www.cuore-sportivo.co.uk >>> Petrol will clear old petrol deposits, but this would involve taking >> <snip stuff> [quoted text clipped - 7 lines] > > Is it dark? Yes I think the snake blew the candle out. Or aummat. Signature/Simon |
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