With today's society, properly trained people have already moved on, and are already working in another field.
People don't stay at one job long enough to get good at anything.
Dang... I must be getting old......
Help diagnosing MS500I
- Thread starter ZeroJunk
- Start date
Help Support Arborist Forum:
People don't stay at one job long enough to get good at anything.
Dang... I must be getting old......
Sorry to sound like a broken record but basics first. Test spark with an ignition tester with a large gap, not just a sparkplug. Make sure fuel is flowing freely and keeps flowing. Compression via handle. Pop the muffler and look. Go to have air also. OMG it's got fuel injection!!!!!.
Don't bypass the normal stuff. It will get you every time.
I would suggest a visual inline spark tester when runni ng to see if it shuts down before it quits.
Don't bypass the normal stuff. It will get you every time.
I would suggest a visual inline spark tester when runni ng to see if it shuts down before it quits.
I'm not talking fuel longevity, I'm talking about fuel that won't even light when you pour some out on the concrete. Lol
If a reset doesn't clear up the issue, and it smokes a bit more than it should, it's probably the injector "dribbling" fuel into the crankcase after shut off, or even while running.
That would mean the injector needs replaced.
I know my encounters are with the TS500i; but it is the same technology.
When a customer replaces a really clogged air filter, or uses a different type of fuel, a reset may be necessary.
It's been really hot here recently, and most saws will develop enough pressure to ooze fuel out of the tank vent, which can wet the air filter with fuel, causing an imbalance in the fuel to air mixture that the computer just can't "tune it out".
My 500i tends to stall after 2-3 seconds when cold, but not when it is warmed up. The dealer could not find anything wrong.
Only the finest filter matters. It will remove anything that passes the coarser filters. If they are all the same pore size, it is a waste of space.
I ordered the cable today. As luck would have it the item is not in stock, not in Hillsborough anyway. I'm sure it will show up from somewhere eventually.
In the meantime we got another MS500I in that had a tree dropped on it. One bar stud is bent , the other is broken off even with the crankcase. The chain brake is broken. Who knows what else. May be one of those gifts that keeps on giving. Not many Stihl dealers that would deal with that. But, we will. Or, I will I should say.
Anyhow, I'll let everybody know what the diagnostic says when the cable comes in. Be interesting to see.
Good idea.
Can't see why it would only quit at idle and not while I am revving it up. But, who knows. If I did I would not be asking LOL.
canucklehead
ArboristSite Lurker
Hey Alexcagle, wondering where I find the screen. I bought used TS500i. Seller was able to start it normally. I couldn't, nor could my mechanic buddy. Took apart and flywheel and stator were worn so we replaced. Mechanic says this has a lot of use and abuse on it. The throttle trigger won't lock for cold start it is so worn. Replaced kill switch and got spark but still tough to start. Replaced plug and fuel filter. Pretty sure it is a fuel delivery issue as plug seems dry after lots of priming and many pulls. Not sure what the spring loaded primer is supposed to feel like but it doesn't have the feel of a normal primer bulb. Once it starts it screams and sounds perfect. Try to re-start after making a couple cuts and same problem. So if it runs good once started, can this be an injector issue causing the near impossible start? trying to start this is tougher than a gym workout.
Are you holding the throttle open when starting cold?Hey Alexcagle, wondering where I find the screen. I bought used TS500i. Seller was able to start it normally. I couldn't, nor could my mechanic buddy. Took apart and flywheel and stator were worn so we replaced. Mechanic says this has a lot of use and abuse on it. The throttle trigger won't lock for cold start it is so worn. Replaced kill switch and got spark but still tough to start. Replaced plug and fuel filter. Pretty sure it is a fuel delivery issue as plug seems dry after lots of priming and many pulls. Not sure what the spring loaded primer is supposed to feel like but it doesn't have the feel of a normal primer bulb. Once it starts it screams and sounds perfect. Try to re-start after making a couple cuts and same problem. So if it runs good once started, can this be an injector issue causing the near impossible start? trying to start this is tougher than a gym workout.
canucklehead
ArboristSite Lurker
yes, holding wide open, as if the throttle lock mechanism worked. In this case, it's my toe arched up.
Well my brand new one wouldn't start either tll I didnt touch the throttle,leave that alone, I think thats the proper way! Try it and get back to me. Just prime it , no decompression, no throttle and pull.yes, holding wide open, as if the throttle lock mechanism worked. In this case, it's my toe arched up.
There’s no high idle on the 500i chainsaw. Not certain about the TS version
Throw it and buy a new one. lol.
There is an idle adjustment somewhere.......
It's probably got a welch plug over the adjusters head.
.
Check your play in the throttle shutter shaft.
.
There is no throttle lock. It's on or off on injected saws.
It's probably got a welch plug over the adjusters head.
.
Check your play in the throttle shutter shaft.
.
There is no throttle lock. It's on or off on injected saws.
Sorry for not adding any resolution to this thread.
I got the 500I with the broken and bent studs back in good shape.
As far as the one with the running issue, the diagnostic program did not identify any problem.
I brought the saw home hoping to put it in some wood, but I never could get it running long enough. The saw has seen a lot of use, clutch sounds like a rattle trap.
Anyhow, I have pulled on it all I am going to.
I got the 500I with the broken and bent studs back in good shape.
As far as the one with the running issue, the diagnostic program did not identify any problem.
I brought the saw home hoping to put it in some wood, but I never could get it running long enough. The saw has seen a lot of use, clutch sounds like a rattle trap.
Anyhow, I have pulled on it all I am going to.
That's a shame your not pulling it anymore.
Tools can be a pita.
I digress
Change the spark plug
GL
That's a shame your not pulling it anymore.
Tools can be a pita.
I digress
Change the spark plug
GL
It's not unusual for me to go through 20 pieces of equipment a day working two days a week at the Stihl dealer. Sometimes more. It's also not unusual to pull on a piece of equipment that you know is flooded 20 or 30 times holding it wide open. Luckily they are usually two cycle weed eaters and blowers and not MS880's.
In the meantime, you can pull to your heart's content.
Do you remove the air filter when doing that?
