Difficulty Level

Tools/Supplies Needed:

• ratchet set
• screwdrivers
• carburetor cleaner (used in the video is Permatex Throttle Body, Carb & Choke Cleaner #80279)
• thread locker (used in the video is Permatex Permatex Medium Strength Threadlocker Blue #24200)
• fishing line or torch cleaning tips
• new seals or gaskets

Procedure:

• if they are equipped with an intake manifold such as this model, they can be remove from the intake manifold, or the intake manifold can be remove from the engine block
• normally I like to take this intake manifold as it can suffer from some build up inside that needs to be cleaned
• the bolts directly on the block can sometimes be seized, therefore a hand impact driver can be used to remove them
• you may find the carburetor or intake manifold stuck which is perfectly normal, just apply a little pressure and it'll pop right off
• remove the fuel line
• remove the metal push rod for the throttle
• find a safe area to work so we don't risk the chance of losing any small parts and then disassemble the carburetor
• disassembly processes will vary depending on the make and model of carburetors
• remove the two carburetor adjustment jets, not all carburetors have two jets, some have one
• you can determine it's existing setting by turning the screw in until it stops and count the rotations
• remove the retaining sleeve holding on the float bowl
• fuel can still be present in the float bowl which will dump out, so be prepared for that with a pan
• remove the float bowl, you may find it's stuck but a little force will easily pop it off
• using needle nose pliers, remove the pin holding in the float
• carefully remove the float, along with the needle
• only use a carburetor specific clean as this won't damage any components associated with the carburetor, yet clean the unit efficiently
• apply the cleaning product in a bucket or pan large enough so the product doesn't spray on surrounding objects
• I would highly recommend wearing safety glass and latex gloves
• apply the cleaner to the outside washing any dirt away, then move onto the inside and finally moving onto the passages
• it is best using something to push through these passages such as fishing line
• I'm using a torch tip cleaning set, but you must be extremely careful with these as they do have a slightly abrasive surface which can increase the size of the holes, especially in the brass components, therefore damaging the accuracy of the carburetor
• spray the cleaner in the intake manifold
• you may find some o-rings or seals have dries out over time and now is a good time to replace those by either going to a local small engine parts supplier or finding parts online
• sometimes we can salvage the old gaskets
• use a gasket scraper or razor knife on edge to remove the old gaskets, be careful not to damage the sealing surfaces
• once the gasket has been removed, use a stone to smoothen the surface removing any imperfections or corrosion
• when using a stone, apply penetrating oil to the surface so the aluminum does not plug up the stone's abrasive surface
• give the unit a final spray down and clean the adjustment needles, then allow everything to dry
• reassemble the carburetor
• reinstall intake manifold, I will be using blue medium strength thread locker made by Permatex
• be sure you do install the float bowl in the correct orientation
• as for the settings on the, you can set them to the previous setting before it was disassembled, but they could have been possibly wrong
• a generic setting to get the engine running for the idle screw is 3/4 of a turn and for the main jet on the float bowl is 1.5 turns out
• reinstall the carburetor back onto the engine block. Again you can use the same product, blue medium strength thread locker by Permatex on the bolts