First run of the year the starter cord won't pull to start. Pulls so far then gets very stiff. Gas Octane 94. Oil Full and clean. Odd thing is that Pull Cord pulls easily when the spark plug is out. When I put the spark plug back in, it is stiff.
Spark plug is not wet. No fluids leak when I pull the cord with the spark plug removed.
Spark plug put in neighbors lawnmower and starts fine.
Could be valve needs set. if it isn't opening at the right time it wont release compression for it to start. it may be the shear key in the flywheel has sheared if you have hit something like a big rock or log or something causing it to die suddenly.
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Hi Jack:
You don't mention make or model so all I can do is relate 50 years of personal experience.
None of the chain saws that I have owned have had a fuel primer.
This has been (and continues to be for my Husky 266) my start routine. Current saws don't have compression release.
- prep includes fill fuel and oil tanks, check chain sharp and tension, bar tip lube.
- Ignition switch on
- Choke full on
- Throttle full and lock set.
- Pull starter cord *(266 takes 3 pulls, Homelite took 6) until engine fires. If I'm fast I can get the choke off before it dies, otherwise
- Choke off, Pull starter cord. Engine should start with 1 or 2 pulls.
Hope this helps.
Something just like this happened earlier this year with my pressure washer. This is what I did to fix it and now it runs great. Check the oil. If it's black or feels the least bit tacky, drain a pint or two of the oil out and re-add that amount of Marvel Mystery Oil. Now, attempt to pull the cord all the way out, but slowly at first. It should get easier to pull after about 5 pulls. If the mower restarts, let it run for 10 minutes until the Mystery Oil is hot and has cycled around inside the engine. Then drain that oil and refill it with a quality brand of oil. To top it off, either clean or replace the air filter, and put a shotglass of Lucas gas & injector cleaner into the mower's full gas tank. I also do this to my lawnmower and weedeater. It works wonders. BTW...If you're unable to turn the engine over by pulling the cord, remove the spark plug and tilt the mower up, so you can turn the blade easily by hand (use gloves). BUT FIRST MAKE SURE THAT SPARK PLUG IS REMOVED. REMEMBER... SAFETY FIRST! Let us know if this helped you any.
I have a mower with a Honda 165cc engine that is temperamental as far as the initial start up is concerned.
Once it has started it always fires up first pull
The problem seems to be the gas is slow to reach the carb / cylinder
I have developed a ritual for starting up.
Open the gas tap.
Lean the mower back until the hand bar touches the ground.
Raise the mower and lift the hand bar so the back wheels are off the ground for a few seconds.
Fully open the throttle, Hold the ignition control back and operate the pull cord.
If it doesn't start first time I am usually rewarded with a promising fire-up.
Sounds wacky but works for me and used to spend 20 to pulls on the cord to get it to fire .
Set choke to full on. To do this depress throttle all the way down and set choke lever to on. Pull starter rapidly until saw fires . Once it has fired set to start and pull starter cord until it starts. If it doesn't start in ten - twelve pulls,reset choke for two or three pulls,then switch back to start. Pull starter cord until it starts. When it starts it wii be at full R.P.Ms. Let run for twenty to thirty seconds. then move switch to run. Hope his helps, Thanks
You may have to take out the carb and get it cleaned / air-blown out. Looks like some little valve is stuck. Also make sure you are getting enough sparks at the plug tip. If you have left it long in a damp place it may take several pulls on the cord for the engine to fire-up and run. Try spraying some WD-40 into the cylinder through the plug-hole. Then pull the cord again. After a few pulls remove the plug again, and put like a spoonful of clean 10/30W engine oil into the cylinder, and keep pulling the cord until you see some smokes at the exhaust. If the engine fires up and run a few minutes, but stops later. The engine might be out due to incorrect oil/fuel misture.
pull the spark plug and spray some wd40 into the hole. then slowly pull the starter. repeat this until the engine pulls smooth. then pull the starter fast a few 10 times to get the excess oil out of the cylinder. reinstal plug and try again
1. 1st change the spark plug to NGK BPMR 7A.
2. Set the kill switch to on position (I)
3. lock the throttle interlock on
4. Do not prime the fuel bulb...this may cause flooding.
5. set the choke to full choke.
6. pull the cord gently until the piston resists then pull hard
7. repeat pull a second time
8. open choke all the way
9. pull cord again hard.
engine should start within 2-3 pulls, release throttle and feather the throttle until stable
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