Wont start clean carbs, new plugs, ignition coil seems to be working properly, contactor looks new, starts on ether wont stay running

I'm sorry to hear that your Husqvarna 125B blower isn't starting. Here are a few things you can try to troubleshoot the issue:

1. Check the fuel level in the tank. If the tank is empty, fill it with the correct fuel mixture (50:1 ratio of gasoline to oil). If the fuel is stale (more than 30 days old), drain the tank and refill it with fresh fuel.
2. Check the spark plug. Make sure the spark plug is clean and properly gapped. If the spark plug is dirty or damaged, replace it.
3. Check the air filter. A dirty air filter can restrict the flow of air, causing the engine to run poorly or not start at all. Clean or replace the air filter as needed.
4. Check the carburetor. If the carburetor is dirty or clogged, it can prevent the engine from starting. Clean the carburetor or have a professional service it.
5. Check the ignition system. If the ignition system is not functioning properly, the engine may not start. Check the ignition coil, ignition switch, and any other related components to make sure they are working correctly.

If you have tried these steps and the engine still won't start, it may be necessary to take the blower to a professional for further diagnosis and repair.

The problem is that when you have the switch in the START position, you are getting power to the ignition system, but not when in the RUN position. Most likely causes are a bad ignition switch, a faulty aftermarket alarm system [if it has one] or a bad ballest resistor wire going to the ignition coil's + terminal. You need to break out your test light and start checking to see where the fault lies.

some after market ignitions don't spark on the first couple of turns but first take off your air cleaner twist the throttle and look to see if gas is spraying in the carb if not give it a little starting fluid if it fires but then dies then its carb issue. now other thing to check is if you have three posts on your coil then its single fire and your plug wires might be going to the wrong spot switch um around.

Hey Cb.
An engine needs three things to run..(assuming all internals are good)

1. A properly timed spark
2. Adequate compression
3. Proper air/fuel ratio

Now, start eliminating one at a time...once they are all correct, the engine will run..

ps. have a qualified professional clean and set the carb...

you need good compression ( at least 90 psi , kicking it with the throttle open) , good crankshaft seals for sucking the fuel/air into the botton end, proper point gap and timing set for spark ( spark should be big and fat,if not the source coil is weak,, this is a flywheel magnito ignition and it needs no battery to fire the plug) if you clean the carb, make sure you also clean the choke pickup tube or it wont choke. also make sure you have the slide installed in the right direction ( not backwards and the idle is not set too high at first...compression/****-good spark at the right time-proper fuel/air ratio and it will run

2 things need to be done first start your bike get a can of wd40 after your bike is warm and running spray around the carb jointsall 4 of them if your engine changes rpms up or down you have a intake leak ether your carb joint gaskets or o-rings need replacing or your carb joints are old and need replacing. at this point wont hurt to have you carbs cleaned also

hi
if you have a good compression,a strong enough blue spark and carburetion for the fuel air mixture try priming the engine(put small amount of gas in the spark plug hole)then start the engine.If the engine runs only the gas you put inside the cilinder there is a carburetion problem to find and fix.
let me know regards savumihai71

better check for the ignition coil for proper sparking or igniting of current in the comprssion chamber, check the ignition coil spark plug wire, check the spark plug, check for proper fuel supply in the flow system to Carbs, check for Ignition timing of the bike, or still you cant solve or still worried then dont worry better take the bike to nearest aurhorised Suzuki service centre for better assistance on this problem surely the problem will be solved.

Not so many reasons she won't start. 4-Strokes are Simple!

Here they are:

Motor:
Fuel Tank-> Fuel Line-> Fuel Filter-> Carb-> Intake (Valve)-> Piston-> Exhaust (Valve)-> Muffler

Carb (Old Style):
Fuel Side:
Fuel Bowl-> Float-> Needle Seat-> Fuel Ports (Venturi)
Air Side:
Air Filter-> Carb Air Intake-> Butterflies (2)
(Clean 'em ALL!)

Hardware (Motor):
Rotor (Magnets)-> Magneto (Ignition Coil)-> Spark Plug Wire-> Spark Plug-> Cylinder Head (Spark Plug Ground)

Ignition:
Kill Switches (Seat, Clutch, etc.)-> Spark Plug/Ignition Coil-> Ground
Key Ignition-> Battery->Starter/Generator

If one of those fail.......= Non-Starting 4-Stroke!

Fixes-
Fuel:
You are either getting too much, or too little. Too much = Carb.
Too little = Carb. Therefore, tear down the Carb (COMPLETELY-Careful!) and clean it up.

Electrical:
Grounding out the System (Kill Switches)
Battery-> Ignition-> Starter.
Magneto->Plug Wire->Plug (Check 'em all!)

Check for spark
If yes, it is getting FIRE, just needs AIR and FUEL

Give it a 5-second shot or two of Starting Fluid (Ether) through the Air intake (filter) and try to start

Does it kick and run really fast and then stop?

If not, pull the plug, clean and check for GAP of 2-3 matchbook covers. Retry. Does it run (or try to)?

If it does, Now we have to look at Clogged air or fuel filter or water in line(s)

Remove air filter. Try ether again. If it starts and runs, replace or clean air filter. Done!

If not... Replace AIR filter and Drain fuel into metal or Glass jug, take off fuel filter, open and drain fuel bowl. Replace fuel filter, refill tank, prime, give it a shot of ether and try again. If it runs, Done!

If it still will not stay running, but you can coax it by giving it a blast every 5-10sec, it could be linkage, stuck choke, throttle plate or jets. Give carb a good cleaning, check throttle plate (in carb throat between it and Air Cleaner) and.check Choke. Try again.

If it still will not run, take to mower mechanic.