Hello i have a rancher 455e with no spark at times runs a short time boggs down and dies then no start or spark ????

it appears you have electronic throttle control. any applicable trouble codes, relating to that system? clean the throttle bore and around throttle plate, don't force the throttle plate. your idle air is electronically controlled.

Hi,becouse you have just set the timing that seems the place to start,I would recheck,if after rechecking it still happens,what I would do is buy one of the sparkplug lights that gose in between the sparkplug and ht-lead then if it stops again you can see if its a electrical problem or fuel problem,if it is electricle problem then and no spark at points check coil isant bracking down.
Hope this helped a bit,all the best hope you sort it.

Test fuel pressure, then spark for nice fat blue spark. Could be bad coil or module.

bogging down no power

part of the efi system failing
fuel
spark plugs
timing


automatic tranny
check oil level
if it was a sensor or shift solenoid
the check engine light would be on

Check to see if there is a leak in the air purge bulb (primer bulb), sometimes they crack and allow air in and don't push the gas through properly. Here is the manual for your saw.
Cheers!
http://www.manualslib.com/manual/514275/Husqvarna-455e-Rancher.html#manual

I srong recommend use the Scanner and computer test, in that way your will have exactly result, Otherwise your are wasting your time and money. God bless you. However you can to www.automecanico, translate the web pages and fix it.
God bless you

Hi, bring the hi speed mixture screw out approximately one eighth of a turn and retry. Hope this helps, regards Phil.

Try removing the fuel cap for a moment to see it can be restarted immediately. If this works, check the fuel tank vent for plugging problems. Also, check for spark at the plug when it dies--if no spark, try a fresh plug gapped at 0.020". If nothing, the ignition module may be failing with heat. Good luck!

If you have 2 carbs that work on another unit but not this one then that narrows down the fuel problem to either an intake/ vacuum leak or bad fuel in the tank.
The compression sounds a tad high which could indicate valve timing ( exhaust opening late or not long enough)
On the ignition side you could have a bad CDI , weak pulser coil or sheared flywheel key.
I believe I would lean toward suspecting the ignition. I had a Honda that gave me fits acting like a lean issue. I was in that carb 25 times if I was in it once. Same thing, idled fine but died on acceleration. It was the CDI. Put a spark tester inline with your spark plug and see if the unit dies due to lack of spark.

ur ride is aging-bout time to inspec carbs-n may need to take um down to clean--chec for proper fuel flow from tank 1st-buy a clymer manual-its detailed in all areas