Empty any old fuel mix from the tank, pour in some fresh mix, dump it out, repeat until the tank is clean then add some more fresh mix.
Next thing is to pull the spark plug and crank it over with the spark plug touching metal on the saw to verify you have a good spark.
If yes, before replacing the spark plug pour a teaspoon or so fo fuel mix right down the plug hole into the combustion chamber. Replace the plug and pull it a few times with the throttle held wide open, it should fire and run for a second or two. If you catch it before it ties try slipping the choke on and see if it will pull a little fuel on it's own. If it dies, again pull it over with the throttle wide open to make sure it is not flooded, if no go then try again with the choke, if not go then you may have to prime it a bit down the carburetor with a little more fresh mix.
If priming it and starting it 2-4 times does not get it running, you will likely have to clean the fuel system and carburetor, may require a carburetor kit as Brian noted.
You may not get a lot of attention here with a TB as we tend to favor the vintage saws.
Mark
You would think after 40 years of starting MACs I would know when I have flooded one or whether it just needs more fuel. But I haven’t learned yet.
I replaced the flywheel on the kart saw today. Thanks to all the posts on how contrary big MACs can be, I brought an $8 harmonic balancer puller. The 10 series have always given up their flywheels to me with just a tap on the shaft. But not this big boy, it took 4 hours of tension before he gave up the fight and decided to let go.
Anyway, I put him back together, poured in about a 1/3 tank of mix, splashed the air filter, pulled out the choke and he popped on the first pull. He popped again on the second pull. But alas that was it. I wore myself out trying to crank him. Choke, no choke, aired out, more mix, full throttle, no throttle, partial throttle- it never popped again. :bang: It didn’t help that the DSP had to be reset every pull. I forgot several times; whacked my knee and busted a knuckle*. I finally gave up when it began to rain, but not before confirming I had a good spark. I felt like I had entered a time warp that send me back twenty-five years to when my dad gave up his MACs for H-----s because they started so easily. :msp_scared:
After reading Mark’s method I beginning to wonder if I haven’t given it enough mix. A teaspoon is more than I have been pouring on the air filter, but then again I see a wet exhaust from time to time.
:help: So short of having the shop boy come down and crank for me, does anyone have any helpful hints on how to start this baby? I will be replacing the DSP next so I hopefully can do a rapid succession of pulls. The saw doesn’t have a throttle latch so I figure I’ll have to work on pulling with my left hand until I replace it or find it doesn’t need one.
Thanks, Ron
*It is a good thing my wife is out of town. I dismissed the knuckle forgetting all about being on blood thinners. I left a pretty good trail through the kitchen before I noticed.