Question about John Deere 3010,3020 Tractor Basic Carburetor Repair

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3020 gas smokes but won't run

3020 gas smokes, pops but won't run has gas spark and good compression

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Posted on Jan 02, 2017

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SOURCE: 3020 carburetor ? john deere gas tractor, 3020

those carbs are real simple you will not have any problem

Posted on Jul 29, 2009

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SOURCE: ran out of fuel. filled and tried to start but

dose it fire

Posted on Aug 12, 2009

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I have a 3020 gas tractor. It ad a zenith carb on it. It started to backfire and would not rev up black smoke. Put on all electrical parts. Still won't run. What may I do?

the black smoke is a sign the carburetor is to rich. i would take the carburetor off and clean it real good and see what happens. maybe check the valves to be sure they are in spec.

Aug 21, 2017 | Garden

2 Answers

What is causing it to run roughly?

Black smoke meaning its burning most probable cause of that is a blown head gasket,check your oil depstick for color change if its brown you got it,its also a simp toms of the crankshaft bearing of your car is already wearout also a posible cause of your valve seat,bearings the mechanical parts by the rocker arm assembly.

Dec 18, 2015 | 1990 Geo Tracker

1 Answer

Keep getting P0308 code misfire

A misfire code is set because one of three things is missing or not right: spark, gas, or compression. You checked compression and it's good, equal to the other cylinders? And there is spark on #8? That leaves a fuel problem, then. How does the spark plug look on #8- if the appearance is white, almost a blistered look to the bottom of the plug, that is an indication of lean running- not enough gas in the mixture at that cylinder. You may have an injector problem on #8.

May 12, 2014 | 2005 Ford Expedition

1 Answer

Overfill oil

Sounds like the engine is tired. Blue smoke is oil burning. Hard starting is oil on the spark plugs and/or low compression. This also can be due to someone adding too much oil.
Sometimes, the carburetor Needle valve hangs u pa bit and the Crank case oil gets mixed with gas so now the oil level is high. Too much oil in a motor is bad too, that would cause theblue smoke too.

Jul 20, 2013 | Yard Machines 11A08MB006 22Inch 139cc MTD...

1 Answer

White exhaust rich with gas 5.4 lt triton

I would suspect that there is a crack in the head allowing the coolant to mix into the cylinder,causing white smoke.The coolant is running low after a drive.I also would suspect some air is leaking into the cylinders.It may turn into a headgasket and head pressure test.also a block pressure test.But first do a compression test.And check if there are bubbles coming out of your radiator at the cap.These are signs that show a fault in the leak in the compression and engine.

Apr 25, 2012 | 1998 Ford Expedition

1 Answer

1998 Craftsman riding mower, 16 horse Kohler engine, engine starts won't stay running, won't run more than 10 seconds. Appears to have good spark, checked fuel filter and supply is good. Adding gas...

The exhaust valve opening at the beginning of the compression stroke is designed to make the engine easy to crank.
Since you know the exh. valve is opening, it means you have torn into the engine (maybe ?) because you don't really see it any other way. Did you put it back together correctly ?
IF an engine has spark, proper timing, compression and fuel it will run.
Since yours runs for a bit, I say you have a carb/fuel delivery problem.

Dec 07, 2017 | Craftsman Garden

1 Answer

The Stihl 038 super won't start. It is getting too much gas on the spark plug when I try to crank it. Just replaced the carb hoping it was that but still it won't start. The saw was working fine a...

hi there mwb15
have you made sure the ignition coil is producing enough voltage to fire under compression load ?

you may get a spark at the plug unloaded but under load it may be breaking down / weak making you think its got a fuel problem ?

does your system use a cdi coil system or point/condenser system ?
spark usually falls into weak spark, no spark catergory

if compression , fuel ( you replaced carb) and exhaust are ok , and you have air and vaccuum tight c/cases only things left are timming and spark

remember F A C T S

F = Fuel A = Air & ( air tight c/cases ) C = Compression T = Timming S = Spark

compression should be about 130- 140 approx if in good running order

take a look and let me know

cheers pauly46

Jun 18, 2011 | Garden

1 Answer

Problems with 640 duke starting,not a battery fault any ideas?

remove the sparkplugs and ground them to the engine try to start check for spark at plug if sparking check for compression put your finger over plug hole try to start if it pops off check carb for gas (didnt say if it was running and then sat for a while) with spark and compression and good gas it should run if your finger dosent pop off then the problem is no valve movement to create compression(broken cam chain) that would allow the engine to roll over quickly or whirr as you said check these things and let us know

Jan 04, 2009 | 2003 KTM 640 Duke 2

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