Note the listing for the tach seems to indicate my model although no tach is listed for my model on any Sea-Doo parts list I have seen... I'm pretty sure the instrument back plane would fit my hood, but I haven't compared the 98 gauge size against the 99 yet. I don't even know if the wiring harness has a spot to hook the tach up? Even if the one in the add would fit and IF there is a wiring spot to connect to, how would I know if this would work as my machine doesn't have a Sea-Doo part number to compare it to? Am I just spinning my prop here? I would like to know my rpms...