Why does my Optimax 150 have 4 Beep alarms? The complainee told that the Optimax 150 2007 model had 4 beep alarms going off without any visible problem. After spending a whole summer and almost $1000 in the shop, the problem still existed. Initially, the mechanic identified it as the problem of voltage drop. What is the Optimax pro XS 150hp?. hallo or hello
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