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Hi, I have a rototiller with a 2-stroke vertical engine. The engine will not start normally. When I put gas in the spark-plug hole the motor fires and will run until it burns off this amount of gas then quits. I have removed the gas line from the tank to the carb and gas flows okay. Is there a carb problem or could there be something else? Thanks

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Sounds like you have a dirty and/or sticking float in the carb. Obviously you have gas flowing out of the tank. but not from carb to engine. This engine is used in dirt so the fuel system is especially suseptible to dirt, especially if you haven't changed your air filter very much. Easy easy and inexpensive fix...usually free if you have some basic tools. Remove the bottom of the float bowl (and be prepared to shut fuel off) and look in the bottom of it. If you can see visible dirt then clean out your carb with some good carb cleaner. The float should fall freely to the down position and fuel should be coming out as it is a gravity feed system (since you said hose goes from tank to carb there is no fuel pump). Shut off fuel, remove fuel hose from carb and blow air through the fuel port with the float bowl still off. This should help get any dirt out of that part of the system. At this point you can put the float bowl back on, fuel hose back on and fuel turned back on and try to start. If you still get nothing, you will need to completely remove the carb and do a cleaning job at the prots and adjustment screws. Depending on how old this motor is, this would be a good time to invest $20-$30 to get a carb rebuild kit and replace all gaskets and seals...doing this also gives you a chance to do a deep cleaning. Good luck, this project should take roughly 1 hr to do completely

Posted on Oct 07, 2009

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What should I check to repair this problem? Vehicle has spark and gass flow, but will not fire.


that leaves compression

or coil....can be ok when cold fails when hot

rings worn or valve clearance to check

Oct 12, 2016 | ATVs

1 Answer

Engine snug to turn. not froze up completely. Overfull oil level.


Drain the gas, then drain the oil. Now refill the oil to the correct amount/height. Remove the spark plug and rinse/clean it in some gas. If there is any build up, scrape it out and make sure the gap is correct. Spin the engine a couple of times to actuate everything. If you see any oil at the spark plug hole, spray a small amount of gas through the spark plug hole and spin the engine to distribute the gas. Reinstall the spark plug and put some gas in the tank. Remove the air cleaner, place your hand over the carb throat and spin the engine a couple of times. You will partially flood the engine, but this will thin any oil left in the cylinder and intake/exhaust ports. Replace the air cleaner and try to start the engine as you normally would. You should have compression by now and the engine should be trying to run. If it feels like it is still flooded, remove the spark plug again and spin the engine a couple of times with the throttle in the off position. Reinstall the spark plug after a few minutes and try to start the engine normally. It should run. It will probably be a bit rough and smoke, but this should pass once the oil burns away. If the engine still runs rough after the smoke clears, clean the spark plug again as it may be fouled.

May 18, 2016 | Briggs & Stratton 550 Series Vertical...

1 Answer

I have a 1979 Harley Davidson Golf cart that I can't start, any ideas?


Hi Dennis, worked on Harley's for 32 years, Harley motorcycles, Harley snowmobiles, Harley pedal pushers, Harley trikes, Harley flat trackers, Harley sidecars, even a Harley streamliner for Bonneville, but never put a fingerprint on a Harley golf cart. But hey it's just a glorified lawnmower engine right? Let's assume the engine was running before it was stored, you need 4 things for an internal combustion engine to run:
1. Spark, make sure you have the correct spark plug NGK BP5ES
and is gapped at .025" and when the threads are grounded against a clean unpainted part of the engine it sparks when turning over the engine. You might want to install a new one or clean the old new one as it could be gas or oil fouled.
2. Fuel, with proper mixture of 2 stroke oil, keep in mind the carburetor jets and air passages could be gummed up from old dead fuel, or not, mmmmmm not sure about 2 stroke fuel maybe the oil mix prevents varnish, If you have not gone through the carburetor I would recommend dropping the float bowl and dumping whatever mysterious substance or contamination you find.
3. Compression, stick your middle finger over the spark plug hole, turn the engine over and if get's properly blown off, then you probably have enough to fire.
4. Timing, make sure your points are clean, and gapped at .023" and will spark when opened and closed with the spark plug installed and hooked up.
I would also recommend purchasing a service manual, OEM part number 99496-80 for $40 You might be able to order one through Harley Davidson or visit the website below.
Finally, if all the above check out ok, try spraying some starting fluid/eather into the air cleaner or carburetor throat while trying to start the engine. If it still won't fire you can contact me at xlch@mail.com for plan "B" Good luck and have nice day. VintageGolfCartParts com

Jul 26, 2015 | Harley Davidson Motorcycles

3 Answers

Why won't it start?


it is flooding . turn off the choke and remove the plug
dry the plug and pull the rope about 10 times to blow all excess fuel ot of the system
refit plug and try it again

May 02, 2015 | Garden

1 Answer

What is the problem when you have spark and you put starter fluid in spark plug hole and it doesn't fire?


might have a sheared flywheel key therefore out of time . not smart to use starting fluid in OLD motors. use mixed gas instead.

Sep 18, 2014 | Boating

1 Answer

Does a ***** boy 50cc have a reed valve? Bike


Hi first thing what is the bike second thing is the engine a 2 stroke, if it is 2 stroke it most prob. has a reed valve, check that the carb needle valve is working as it should, then drain the cylinder and crank of fuel check the plug sparks, leave the carb off and put a small amount of petrol in it, try and start it if it fires once or twice, then it should start with the carb on it, if not there is a problem with the carb. good luck.

Sep 12, 2014 | Motorcycles

1 Answer

Kia ora, i have a makita 2 stroke grass cutter, that just wont start, checked, spark plug, fuel, took it apart and cleaned it..still wont start. Please help, it does not have model number only product...


Engines need 4 things: Spark, compression, fuel, exhaust

1) Does spark plug have spark?
Take out plug, put plug wire back on plug, hold plug threads against metal part of engine, pull cord, do you see spark between plug and engine?

2) While spark plug is out, put finger over hole and pull cord. Do you feel suction that shows compression?

3) What about the exhaust port? Is the screen blocked with carbon deposits and dirt? Soak it in WD-40.

4) Do you have 2-cycle oil in gasoline? Do you have fresh gas? Did you leave gasoline in tank for several months? Is the carburetor clogged with gum?

5) What about the air filter? Does it fire up without air filter? Will it fire if you spray WD-40 into carburetor? Can you keep it going while spraying WD-40 into carburetor?
If it fires with WD-40 but won't keep going on it's own, then the gas is not getting to carburetor or carburetor is clogged with gum.

Oct 08, 2010 | Makita Garden

1 Answer

Need to get my hands on a manual for a mazda b2600. Just put a new head gasket in it and the timing is all out.


take the spark plug out of the hole on the engine. the very front plug.
have someone bump the engine for you. take the cap off of the distributor, and when your friend bumps the engine watch the way the rotor is turning. i think its counterclock wise. but anyway, hold your finger over the spark plug hole and have the friend bump -bump- bump the key until the air pressure "Pssst" blows your finger out of the hole. thats the compression stroke of your engine. and right now its set to send a spark to that #1 piston.
SO look at the rotor, and pay attention to what direction the rotor is pointed. and when you put your distributor cap back on, your wire for #1 spark plug has to be pointed at the rotors tip, to get spark. so put cap back on, and then put #1 at the rotor tip, and remember what direction the rotor spins ? now put your spark plug wires on the cap to match the "firing order" The firing order is 1-3-4-2 with the cylinder closest to the front of the vehicle being #1 so if the rotor spins backwards . wherever the rotor tip is now ( since you bumped it to the compresson stroke ) on the #1 cylinder, you know where 1 is. now put #3 piston wire on the next plug, on the distributor then 4 , then 2. tighten everything, put the spark plug back in. and start your truck bro.

Jul 31, 2010 | Mazda B2600 Cars & Trucks

1 Answer

My truck is a 1996 1/2ton there is gas getting to the engine and there is spark in the spark plugs we fixed the distributor cap and checked all the spark plug wires, the truck will turn over but it will...


Hmm, This sounds like a timing problem.

Best way to do this easily is that:

Take out the #1 spark plug crank/tap motor over until air comes out of spark plug hole--compression stroke(this is "TDC"---Top Dead Center)

Remove Distrubutor cap and check and see if rotor points to #1 spark plug wire on cap----if not move the #1 spark plug wire to that position on cap---then install rest of spark plug wires according to the firing order from the #1 plug wire.

Install #1 spark plug and start truck---you may have to rotate distributor a little bit to get best performance.

Jan 23, 2010 | 1996 Chevrolet C/K 2500

1 Answer

I have a 25cc Craftsman Blower/Vac model 358.794941 which will not start. I have replaced the spark plug and carburetor. This is 2 years old and not even 10 hours on it.


hi

if you have compression and spark(a blue one) try priming the engine,put some gas in the sparkplug hole and start the engine.if it fires only the gas you putted inside there is a delivery problem to find and fix(carburator and hoses.

bye

Oct 05, 2009 | Craftsman Garden

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