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Mcculloch MB3202 wont start, new fuel lines, fresh fuel, cleaned carb, new plug, cleaned magneto air gap .021, still wont start seems like it doesnt get any fuel in chamber

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  • Sam saunders May 08, 2017

    Nice nd smooth, compression good also, i know carb adjustment screws where moved

  • hopper_59k May 08, 2017

    On a 2 cycle engine compression means nothing. You could have a seal bad on the crankshaft or at the intake not letting it pull fuel into the engine or a stuck piston ring.



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Remove the muffler and inspect the piston to see if it is scored.

Posted on May 07, 2017

  • Sam saunders May 08, 2017

    Its like it doesnt get any fuel, piston is smooth

  • hopper_59k Jun 03, 2017

    You could still have a stuck piston ring or a vacuum leak.



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Posted on Jan 02, 2017

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SOURCE: Carb adjustment on McCulloch 32cc?

the l is for idle and the h is for top end but thats not ur problem it sounds like ur carb is clogged there is a screen inside of the carb the fuel gets crystalized and blocks off some and sometimes all of the fuel ill bet thats the problembut u can try the adjustments first give the unit full throttle and turn the h adjustment screw in and or out till it sounds great and at full power if that dont work then do the screen in the carb

Posted on Nov 14, 2008

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SOURCE: Tecumseh HM80 on coleman generator. won

check to see if it has a smeared or worn key way it is what times the fly wheel to the engine if not it is possible that it coul have problem with a valve or engine timming

Posted on Mar 01, 2009

  • 666 Answers

SOURCE: starts runs min. or two then stops....

Go to then click customer care, then click manuals and parts. Type in model no. and download the owners manual. This should get you the spark and flywheel gap. Probably still something in the carb. Some orifices are very hard to find and to clean but they must be clean. Also check for dirt dopper nest in the muffler.

Posted on Apr 06, 2009

  • 1 Answer

SOURCE: Tecumseh ohv130 engine wont start.

Replace the carburetor. It is not fixable, even though you can buy a rebuild kit for it. Been there, done that-- had to learn the hard way. What?? I said to myself. I've been fixing these small engines (shade tree) for years, and we always could rebuild the carb and adjust for peak performance. I absolutely refused to believe that my "rebuild" didn't "fix" this carb. Hard to believe, but true. Replace the carburetor. This is your "something new" you've learned for today.

Posted on Sep 03, 2009

  • 10 Answers

SOURCE: her chee fun 50 scooter. when trying to accelerate

Assuming everything is back toether properly and was not the problem the frst place, remove the exhaust pipe to expose the exhaust ports to ensure they are not carbon block. Also check the exhaust it self for a spark arrestor screen that could hve been carbon fouled and clogged. Cannot free flow because of the problems noted above, you will not be able to run a two-stroke engine reliably.

Posted on Sep 30, 2010

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1 Answer

My stihl fs56 strimmer will not start,i have a spark & fuel new plug cleaned carb help please

if you have spark and fuel then id be looking at lack of compression.. damaged piston ring or damaged crank seal/gasket

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1 Answer

Craftsman electric start snowblower wont start

That's refreshing! You've already done a lot of the work!
First, try regapping it at about .040, see if it starts there. If not, check compression.

Does it generate any spark at all? Try it with a screwdriver instead of the spark plug. If none, track back to the magneto - also check any shutoff wiring at the magneto.

Um... you DID put fresh gas INTO it, right? 8) If you take the bowl off temporarily, does gasoline drain freely from the bottom of the carburetor?

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1 Answer

Lost manual it has not been started in along time I need to know how to change spark plug ,clean carb. correct fuel mix and what ever else I need to do.

To change the spark plug, remove the top cylinder cover, take a 19mm box spanner ( a pretty standard chainsaw combi wrench ) turn the plug anti clockwise to remove, re fit clean or new plug, wash the air filter in soapy water and allow to air dry, if the saw has a primer bulb, fill the saw with fresh fuel and prime 15/20 times until the bulb is 3/4 full of fresh fuel, this will flush the carb through, so there should be no need to remove and clean the carb.

Apr 10, 2011 | McCulloch Garden

2 Answers

Will not start.

Check the chainsaws compression by putting your hand over the exhaust while slowly pulling on the string you should feel small bursts of air and feel resistance on the chain if not the cylinder most likely has lost compression and needs new piston rings.
Also, check that the spark plug is firing either with a spark plug tool (sold at many hardware stores or places like harbor freight). Or check it by removing it, connect it to the plug wire and touching the tip of the plug to a ground (the Finns on the cylinder or anything metal on the saw). Make sure you see a spark in between the two electrodes on the plug (do so in a dimly lit area as it can be hard to see). If there is no spark check the flywheel and magneto for any dirt or other material and clean it with a wire brush if there is no spark after cleaning the magneto, plug, and setting the plug you will need a new magneto.. Also make sure to check for dirt and carbon build up on the plug and use a gap tool and make sure the plug is set to the specs. on the manual (gap tool can be found at any hardware store) If you have cleaned the plug, properly set the gap, tested the spark, and have compression the problem is most likely a fuel delivery or fuel air mixture problem.
Make sure that the air filter is clean and free of any fuel/oil, moister, and dirt a dirty filter will foul operation.
Check the fuel tank for build up along with the fuel line and filter/strainer in the the tank if there is one. If you find alt of gum or particulates in the tank or line/filter clean them out with carburetter cleaner. You can also use starter fluid (sold at any hardware store) to clean the tank and lines and use it along with a clean tank/lines/carburetor. check the carburetor for build up by removing the bottom screw on it to inspect the bowl and carb float for residue. If you find thatr the carb bowl and float has particulates and other build up clean it with carb cleaner.
Also check the idle and running screws on the carb for proper adjustment the user manual will have the information to do so.

Jan 24, 2011 | McCulloch Garden

1 Answer

Homelite U2T608 edger/trimmer will not start. New plug gaped properly. Dropped carb, dissembled and cleaned out all ports. Fuel is flowing and is new. Motor wont even "cough." Suggestions?

Check the magneto for spark. Remove the plug and reinsert the wire and hold it against the engine as you pull the starter. You should get a nice, blue spark. If you don't see one, the magneto to flywheel air gap may need adjusting or the coil module is bad (rare). You basically need good compression, fresh fuel, good clean air intake, and a strong spark to get it to "pop." I realize you may know these things, but, most people are unaware of the .010"-014" air gap required between the magnets on the flywheel and the legs on the coil module. Disassembly is required to get to it and you take the same steps you would if you wanted to fix the pull rope. A standard business card has about the proper clearance needed between the aformementioned parts. Post back if needed. I am here to help.

Oct 12, 2010 | Homelite Garden

1 Answer

Has been sitting for a few years.. cleaned carb and chedcked settings on H and L screws.. still wont start.. replaced fuel lines and primer bulb.. and its a mac 3227 weedeater.. cranks but doesnt start,...

siphon out the old fuel and put brand new fuel in the tank. Change the air filter even if it looks ok. Put in a new spark plug. Then get a can of starter fluid and an assistant. Squirt some starter fluid into the air intake and start it up. have your assistant continue to spray the starter fluid for a minute or so until it runs on its own. J.

Sep 30, 2010 | McCulloch Garden

1 Answer

AH520 Tecumseh engine will not start; no spark to plug. Checked for spark to plug; no spark Cleaned fuel line from tank to carb. Used fresh fuel. Snowblower has not been used for about 15 years.

I would recommend a serious carburetor cleaning or even installing a new rebuild kit after the machine setting up for so long. The spark problem must be checked for either the (magneto to flywheel air gap) or the condition of the electrical points and condensor on it (if this older model has them)

Sep 19, 2010 | Husqvarna Garden

1 Answer

I have a McCulloch MB3202 back pack blower that will not stay running. I have pulled carburetor and cleaned and reassembled. Replaced fuel filter and lines. I can get running if I use starter fluid for a...

Must have good strong blue spark

Must have correct fresh fuel / oil mix.

Must have air. Check for leaks at intake manifold.

Can you use choke to keep it running, if so air leak OR lack of fuel.

Jan 08, 2010 | McCulloch Garden

1 Answer

MB3202 Will NOt Start Change The gas line in

It is most likely the carb is gummed up and not allowing the correct amount of fuel/air mixture into the cylinder.
First remove spark plug, connect it to the coil wire, place end of plug on engine block or head. Pull engine over and look for good strong spark. If it is good, then the problem is the carb.

Nov 23, 2009 | Garden

1 Answer


Not so many reasons she won't start. 4-Strokes are Simple!

Here they are:

Fuel Tank-> Fuel Line-> Fuel Filter-> Carb-> Intake (Valve)-> Piston-> Exhaust (Valve)-> Muffler

Carb (Old Style):
Fuel Side:
Fuel Bowl-> Float-> Needle Seat-> Fuel Ports (Venturi)
Air Side:
Air Filter-> Carb Air Intake-> Butterflies (2)
(Clean 'em ALL!)

Hardware (Motor):
Rotor (Magnets)-> Magneto (Ignition Coil)-> Spark Plug Wire-> Spark Plug-> Cylinder Head (Spark Plug Ground)

Kill Switches (Seat, Clutch, etc.)-> Spark Plug/Ignition Coil-> Ground
Key Ignition-> Battery->Starter/Generator

If one of those fail.......= Non-Starting 4-Stroke!

You are either getting too much, or too little. Too much = Carb.
Too little = Carb. Therefore, tear down the Carb (COMPLETELY-Careful!) and clean it up.

Grounding out the System (Kill Switches)
Battery-> Ignition-> Starter.
Magneto->Plug Wire->Plug (Check 'em all!)

May 28, 2009 | Mtd Garden

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