Thanks for the tip, I was about to ask Philbert how often might I expect to change it.If you wait until the primer bulb splits to change it, you've waited way too long.
They are not only nice to help start a dry saw(not that I leave mine dry), but they are also a great fuel system condition indicator. If they stop looking mostly clear, it's time to change out not only the bulb, but also the fuel lines and filter and a carb kit isn't a bad idea.
I use real chainsaws, my 550s, 346, 353, ms201 and many others I've had have primer bulbs.
What I think is interesting is how some saws without them will crank almost instantly , then others will take many pulls. Dolmar makes some of the easiest starting saws.
Interesting fact, most saws that are low on compression will need to be pulled over more to get them to start, since the impulse to the diaphragm/ carb is weaker.
Have a great day guys. Blue skies here today .
Currently, as new, it's clear and uncoloured. I've seen photos of saws with them and they seem to yellow and darken. Is that when you'd change them or do they actually go cloudy?