Question about 1997 Yamaha Royal Star XVZ 1300 A

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'97 rstd cold start, full choke,, cyl 3&4 do not fire. lots of popping/after-fire from right side till warmed up a bit. once warmed up runs/idles ok. good spark thru all. idle fuel circuit problem or maybe carb heater prob??? btw,,, only 13k miles

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Low milage tells me most likley the carb is gummed up. You may need to remove and clean out or try some fuel injection cleaner. Use twice as strong as recommended. Your description points to not enough fuel when cold which is when it needs the most. If your handy I would remove the bowl and blow out all chambers and tubes with brake cleaner.

Posted on Jul 29, 2010

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I was using my o17 saw today it was runing Just fine I shut it off when I went to start it again it fired on choke seting after that I could not get it to do anything what is wrong with it


All 2-strokes love to run rich when cold thus full choke till it kicks, half choke to start and leave on for 5 seconds high rev's to warm & lubricate, then no choke to run. Restart when hot is 1 pull full choke (you are now flooded) & then no choke til it starts. Try it. Works every time on all of my 2-stroke engines.

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My 1968 mustang wont idle when I lift my foot off the pedal. But it will idle when I step on to the pedal. What do I do?


If you look at the throttle linkage on the driver's side of the carb you will see that it should rest on a screw at idle. Turn that screw in a little should solve your problem.
If that doesn't fix it then you will have to adjust the mixture screws in front.

Aug 14, 2013 | Cars & Trucks

1 Answer

Have new 450 and is very difficult to start. Lost or didn't get book. How do I start it and re-start it while still warm??


Start procedure is, push the primer as many times as it takes to 3/4 fill the bulb ( you cannot over prime it ) pull the blue choke lever fully out,place the saw on the ground with your right boot through the back handle, crank the engine until it fires once, do not continue to crank the engine with the choke out ( they will not run on choke, only fire ) push the choke fully home, crank the engine until it starts, blip the throttle trigger to bring the saw to idle, warm engine, pull the choke fully out and push in again without cranking engine, this will engage the part throttle, crank the engine until it starts, blip the throttle to bring the engine to idle.

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I have a 2005 harley davidson sportster xl 1200 custom. after bike is at normal operating temp.when i stop for redlight or stop sign, bike idles to fast.i can let out on clutch little bit and it will slow...


If the carb is adjusted correctly, the engine will not idle without the choke when cold. I will usually take at least 3 to 5 miles of riding to get the engine warm enough to idle by itself without the choke. If your bike is a full operating temperature, it should idle at about 1000 RPM. If it's idling higher than this, you need to slow it down a bit.

Remove the air filter cover and look at the top right side of the carb. You'll see a screw there . This is the throttle stop screw. Turn the screw counterclockwise to lower the idle speed to 1000 RPM or so. Blip the throttle and let it settle back to idle. Reset it if necessary. Once set, put the air cleaner cover hand on.

Mar 14, 2011 | 2005 Harley Davidson XL 1200 C Sportster...

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What position should the choke lever be when starting a cold 1986 Shadow motorcycle?


The rubber cover can be tightened or loosened to hold the choke lever in place. I like to set the rubber cover just tight enough to keep the choke out but if I start driving it starts to slip back in by itself. If you pull the plunger all the way out it will raise the idle and should be the best position for the initial start. You may find you have to touch/ twist the throttle just a teeny bit to get the first pop. Then run full choke for the first 10-20 seconds till the fast idle is steady. Then push in the choke till you have a slower more comfortable fast idle. At 45-60 seconds push the choke in just enough to keep it idling. It should be safe to slow drive with the choke out about a quarter of the way. Take the choke off completely when the bike will idle on it's own 1 to 2 blocks down the road. If the bike is still boggy on take off put enough choke back on to get a smooth take off , then while slowly cruising during warm up push the choke all the way back in. Take it easy till the engine is warm.

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1 Answer

My chainsaw stards for a few seconds and stops


First make sur your fuel mix is correct and thoughrlymixed. Shoul be 50:1 mix. Next make sure you try starting with switch in choke position and pull srarter cord until it fires. Once it fires move switch to run and pull till it runs. Let idle for a short time if it will.Try to slowly accelerate several times till engine warm up. If it will not run on idle adjust idle screw up till chain just starts to move then back off a little. Also if you are starting in cold conditions ,below 32 degrees remove top cover and reverse air flow deflector shield . Hope this helps. Thanks

Nov 23, 2010 | Husqvarna 350 18 Inch Gas Chainsaw 52CC...

1 Answer

18"poulan chainsaw


Start at 1.5 CCW form lightly seated then tune for performance like this:
Carburetor Adjustment by Madsens.com
http://www.madsens1.com/saw%20carb%20tune.htm
CW is leaner; to lean will destroy the saw. If over tightened closed (CW) the adjustment screw faces are easily marred; marred adjustments are difficult to impossible to set properly.
Clean the air filter; adjusting with a dirty filter can cause a run lean condition once cleaned and the saw run.

There are 2 wav (sound - idle & full – may not be highlighted) files that I find most helpful, I think you will too.

I think your starting procedure may be the cause of flooding. Flooded is the #1 cause of hard starts in 2-cycle engines. Read carefully the recommended start in your manual. most miss the second note. It should be similar to this (read 3, read it again):
Warm start in the manual says 1/2 choke BS. Close choke, (sets fast idle) open choke, pull rope.
Start Procedure
Cold:
  1. Ignition on/off to on
  2. Set compression release – optional step even if saw is equipped with a compression release
  3. Pull (close) choke, set fast idle (done when choke closed on some saws); pull starter and listen for an attempt to start. once heard (usually two pulls; no more than 4).
  4. Set compression release – optional step even if saw is equipped with a compression release.
  5. Push (open) choke pull starter until it starts (usually first pull).
Warm:
  1. Ignition on/off to on
  2. Set compression release – optional step even if saw is equipped with a compression release
  3. Pull (close) choke, set fast idle (done when choke closed on some saws) – Do not pull with choke closed.
  4. Push (open) choke, pull starter until it starts (usually first pull).
If you still have trouble reply as you did before. I will get back to you. HTH
Lou

Feb 18, 2010 | Poulan Garden

1 Answer

Won't start, can't remember starting procedures and dont have manual


Make sure the fuel valve is on. Generally that means pointing down inless there is a diagram on it.

Turn the switch on.

Pull the choke on the carbuerator on full. There will be a picture of a butterfly valve set it so that it is closed. Pull the cord till the engine fires. let it sputter for a second, then open the choke. If the engine dies right away, do all of the above again but once it fires, only open the choke half way. once it warms up a bit open the choke completely.

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1 Answer

03 renault scenic wont start when cold unless reved can cut out but ok on restart


hi if on engine starting and warmed you have no problems and no warning/malfunction light showing ? then i would suspect that trouble points to the engine coolant temperature sensor it tells the ecu to provide excess/choke to simplify? fuel as engine is cold so in simple theory you are trying to start with no choke as it was on old carburettor engines if you are old enough to remember ?? (joke) it was much simpler in those days however check the sensor and its plug is clean/secure and wires are ok ? when sensor works your engine fires up and runs withslight increase revs till warmed then settles to idle revsas specified in h/book this sensor is not the temp sensor that works the temp indicator guage it is a seperate sensor and larger screwed into either cyl head or block on the side hope this helps good luck

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3 Answers

Ryobi 31cc lawn trimmer carb adjustment


As with all 2 strokes if you have compression and a reasonable spark, you only need fresh fuel with correct oil ratio) and they must go !(as long as you haven't fiddled first and all gaskets are sealing) I start mine by(1) pumping the primer till it is firm,(2) full choke,(3) pull till it kicks ONCE,(4) half choke, pull till it runs,allow to warm up and(5) switch to run (you may need to apply a bit of throttle while pulling as in (4)(or give it a few more pumps if it dies) If all is ok, check that when properly warmed up there is a smooth transition from idle to full revs, if it hesitates it may need the LOW SPEED mixture leaning (clockwise) SLIGHTLY.If it dies the LOW SPEED mixture may need richening(anti-clockwise)(adjust 1/8 turn at a time) Make sure that motor is just peaking at full revs and is on the RICH side of peaking (HIGH SPEED mixture)(this will avoid seizing it Adjust both till it revs cleanly and is JUST rich at full, and idleing nicely and it should start without too much trouble.(If you have fiddled and are lost,-about 2 1/2 turns out from closed on both needles should get you started)

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