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73 xlch sportster carburator problem


have aftermarket carb on it, won"t start,choke it plugs are always dry,
carb bowl is full of gas and throttle is spraying plenty of fuel. what to do???????

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I had a Bendix on my 64 that did the same thing, I finally disconnected accelerator pump from linkage and primed it manually about 3 squirts, kicked it through with finger on kill button once or twice and then tried to start it. This helped alot. I finally got an S. U. to replace it with and it is beyond a night and day difference! more power, smoother and ten times easier to start. Cylinders burn a much more balanced mixture of lean to rich. The Bendix always had one plug lean and one rich.
Good luck

Posted on Mar 09, 2009

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I would take the spark plugs out and hook them up to the spark plug wires and have someone start turning the engine over. i would either use the side of your engine cylinders or a piece of metal and see if you actually have a spark going from the ignition coil to the spark plug.

Posted on Sep 01, 2008

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Posted on Jan 02, 2017

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2005 Harley Davidson XL 1200 R Sportster Roadster misses on takeoff


Hi, Stacey and the usual suspects are:
1. Throttle cables misaligned or misrouted.
2. Damaged or restricted fuel tank venting system.
3. Intake system air leak.
4. Vacuum piston malfunction.
5. Pinholes or torn diaphragm.
6. Accelerator pump leaking or no output.
7. Plugged bowl vent or overflow.
8. Fuel level in bowl too low.
9. Restricted fuel supply passages.
10. Plugged jets or passages.
11. Worn or damaged needle or needle jet.
12. The enrichner valve/choke not seated or leaking.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below and for more specific information or questions at no charge please feel free to contact me at xlch@mail.com. Good luck and have a wonderful day.
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Harley Davidson 2005 Sportster Service Manual
http://partsfinder.onlinemicrofiche.com/ronnies/showmodel.asp?make=hdmc
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Instant Tech Relief To speak to me personally absolutely "FREE"

Jul 16, 2017 | 2005 Harley Davidson XL 1200 R Sporster...

1 Answer

6mo. old wont start checked gas in float bowl spark plug dry, and sparking, comp. test 50psi????throttle open when testing


you need to rebuild carburator. its very easy pay attention to what you are doing .blow out all holes in carburator with carb cleaner then air reasimble.

Mar 16, 2015 | Garden

1 Answer

Harley wont start with choke on,but can start it with choke off


Hi Cully, if you have a carburator the usual suspects are:
1. Damaged or restricted fuel tank venting system (gas cap).
2. Inlet system air leak.
3. Vacuum piston malfunction.
4. Accelerator pump leaking or no output.
5. Plugged bowl vent.
6. Fuel level (float chamber) too low.
7. Restriccted fuel supply passages.
8. Plugged jets or passages.
9. Worn or damaged needle or needle jet.
10. Enrichner valve not seated or leaking.
Good luck

Jun 03, 2012 | 2001 Harley Davidson XL 1200 C Sportster...

1 Answer

98 Sportster 883. starts & w/ choke, won't take throttle or choke off w/o stalling. Bike sat for a long time (years). Used Gumout to clean carb b4 pulling tank, cleaning & put fresh fuel -...


No, nothing else to check. You need to completely disassemble the carb and clean it out. When gasoline left in the float bowl evaporated, it left behind the gummy additives that the refinery puts in the gasoline. This mess has clogged the jets and small passageways in the carb. The reason it runs with the "choke" out is that it is not a real "choke" but rather an "enricher circuit". It has it's own air passageway and fuel metering "jet" in the float bowl.

Good Luck
steve

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2 Answers

HI there, I got a lawn mower mtd yard machine briggs ans stratton 4,5 hp, it start pretty well but won't stay running, I change the spark plug, oil, gas brand new, clean the carburator, clean the air...


There could well be a build up of sediment and debris in the main jet to the carburetor. It is easy to get to and clean. It is the brass bolt that holds the lower float bowl onto the main body of the carburetor. To clean it, drain your gas. Remove the bolt and external washer UNDER the carburetor bowl. Clean out the bowl of any sediment and/or water. To clean the brass bolt, use no metal objects. Carb/Choke aerosol spray cleaner will do the job. Pay close attention to the hole in the bottom of the bolt and the very small holes about 2/3 of the way up the bolt. Clean till shiny with holes cleared and reinstall. Your fuel flow problem and shut off condition may be solved.

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3 Answers

I have A Scott Bonner lawn mower ,high performance,overhead cam, SX 4000, 4 stroke.I am finding it very difficult to start the cold mower every time I go to mow the lawn.It takes me about half an hour of...


Hi and welcome to FixYa, I am Kelly.

The symptoms you describe are typical of debris in the fuel bowl of the carb. I am going to assume for the moment that it is a similar to a Briggs and Stratton engine. Engine model type and serial information is what we work with to resolve engine problems regardless of the mower brand. I note you said it was a Scott Bonner SX4000 engine. I am also assuming that you have the 18 inch GreenKeeper like this one:
http://www.rovermowers.co.nz/www/rover/Home.nsf/13a851504c93cb754a257821000cfc6b/$FILE/28045.pdf

I do not have access to Scott Bonner Engine parts or technical data but if you clean out the fuel float bowl and it is still hard to start then the choke function of the engine is not working. Your engine has a "Bowl drain" screw on the bottom of the carb float bowl for removing carb debris or water in addition to a bowl nut.

Most likely due to the throttle cable needing and adjustment so that the choke is closed when choke is selected. Adjustment of the throttle cable is as simple as losening the clamp screw (Do NOT remove it) on the side of the carb throttle control and moving the throttle to STOP then re-tightening the clamp retaining screw. This should allow your choke to move full closed when selected. You may have to experiment with full throttle and STOP throttle control positions with the clamp screw loose but not removed to see which position will give you full throttle, choke and STOP. After each adjustment you MUST tighten the clamp screw to test the throttle cable travel on the the throttle plate. Beleive it or not... the person that assemble the mower made the intial throttle adjustment. It may have never been tested before you got the mower.

If you still have problems.... this is the brief way to start an engine that has choke problems. Remove the spark plug and squirt a splash of gas into the spark plug hole and then re-install the spark plug. Just don't over-do the splash of gas and if your messy wipe off the excess so you do not start a fire. (This method always works but you occasionally foul a spark plug with too much gas)

Thanks for choosing FixYa,
Kelly

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1 Answer

It will start on full choke and run for about 5 seconds and shuts off. I changed oil because it was black. It did same thing a year ago and shop said the fuel line was blocked? I ran it for about 25...


first if its a honda,is it a gas/oil mix as the gas/oil mix plugs up quicker than a 4 cycle engine ?even 4 cycle engines that get bad gas i.e. water in the gas will plug up the carburator from rust, white rust(from water minerals) corrosion,dirt,etc.,when its running and just as it dies out,pull out the choke and see if it picks back up in r.p.m.'s,if it does,then you know its lacking fuel from starvation from plugged fuel lines/carb to keep running,then you need to re-build the carburator or you could first try a can of carb cleaner while its running down into the carburators intake,but this is a tell-tale sign of a bad/dirty carb,try this,with a small wrench,pull off the carburarors "sediment bowl" located just ubder the carbs body and carefully unscrew the brass nut and remove this bowl(careful to NOT lose the gasket) and see how moch water/dirt,etc., is in the bowl if theres water it will look like droplets in the gas in there,if you have this contamination you need to clean out both the gas tank and carburator and all fuel lines leading to and from these to the engine

Dec 28, 2010 | Honda Electrical Supplies

1 Answer

My saw starts and runs "roughly" With the choke


Unfortantaly its awaly the carb with this kind of tool Its a two stroke so you mix oil in the gas then it sits aruond for a couple of years until you need it and the oil gas mixture gets gummy and sticks the neddle valve witch lets the fuel into the float bowl and also shuts it off Try this get some starter fluid get the thing running on choke and spray it into the carb it may clean up some of your problems But the best thing to do is take apart the carb and clean it then it should work like new and its realy not that hard to do and you don;t need any new parts it can be done on a table in 20 minutes

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1 Answer

1992 Honda CB 750 Nighthawk will not idle without choke


Hi, Emeraldcp and the usual suspects are:
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2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Vacuum line from the petcock to intake manifold cracked.
5. Float needle and seat sticking.
6. Float level too low.
7. Carburetor bowl vent line clogged/blocked/pinched.
8. Idle adjusting screw set too low.
9. Air/fuel mixture screw set too lean.
10. Idle port, transfer ports, slow air jet clogged.
11. Slow fuel jet clogged.
12. Faulty fuel pump.
13. Faulty auto choke or wiring connection.
For more information about your issue and valuable "Free" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
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3 Answers

Can't start brisggs & Stratton 21in mower. I


Get some GUMOUT carburator cleaner GAS ADDITIVE. Put about 1/2 TEASPOON in the gas tank and about 1 tablespoon per gallon into your spare gas. The float pin is probably sticking from winter non-use. This will free it ip.

You can also remove the bowl from the carburator and spray everything to immediately dissolve the varnish. Be careful not to lose the pin spring.

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