Hard to believe that they put those primer bulb on equipment that's made to be in ice cold weather!! Is it the 'soft' bulb or those cheap clear looking ones? I have a very old Toro lawn mower and it uses a soft one that you can't see through. Had the mower since the mid/late 80's and have only had to replace it once.
Black rubber. It’s a ‘97 and I only replaced it once before. I think the one I just got is aftermarket and doesn’t rebound very well. Probably going to get a spare OEM if I keep this much longer. It smokes a bit after starting, but still works great