pulse valve

[steplift20]

today i winterized my motor and it was very hard to start, when i did get her started it smoked like when you start er after you winterized it plenty of smoke and hard starting, the same thing happened last year and my mechanic said and changed the pulse valve, she ran good bit now it was the same problem do those pulse valves go he said they rarelly go but did you ever here of changing 2 times in one year