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Reading the OB trim gauge
i am new to boating and new to reading my trim gauge. When I bought this used 2005 GS201 OB the trim sender arm was broke so I replace that part and now the trim gauge works. Before getting this fixed I really wasn’t sure how much I was trimming up when speeding. Today under WOT after planning I trimmed up to about 3/4 up on the gauge. Well my temp sensor kicked on and boat reeved down and I quickly shut engine off. I think I was too high and the OB wasn’t sucking enough water. My gauge reads down, 1/4down, middle, 3/4up, and up, How to you guys/gals work the trim gauge when speed boating? Also FYI my engine pees good so no issue with my OB water intake system.