Originally Posted By: sneakboxer
I just picked up a free two year old brigs 4.5 horse. The engine runs strong on 10%e but the primer bulb has turned in to red goo. Did 10%E do this i don't know but i have never seen that happen on real gas.
The primer bulb, according to B&S, deteriorates because of stale gas.
I have a mower that was never used on 10% ethanol (it stopped running before 10% ethanol became available here) and the primer bulb was deteriorated. (It had been sitting in the backyard at my rental property for several years, one of the previous tenants left it...it needed the valves cleaned...after doing that it started).