The fuel tank selector switch it the only thing that I do not like about my PII. I find it confusing for me since they are not labeled. My dealer told me that the “unused” position was for an under-the-seat fuel tank option. Last year during TOC my bulb did not want to hold prime right at take off. I was excited and in a hurry. The unlabeled switch did not help. I guess I should take a magic maker to it. I did get the bulb to prime after holding it in vertical position and banging it to get the check valve to work. I was left behind, some laughing about it, single finger salute as they blasted away. I knew a few short cuts (side chutes) that I could blast thru. With a good boat and a little slight of hand it amazed the guys that headed to the same area. I loved to hear the guys talk during weighin about how fast BCBs run. Swanson got left behind and caught up in his Pantera… I am now accused of having a modified Hi-output Merc