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Update3. Looks like I'm back in action. 5200rpm @ 42 Knots. I believe the new diaphragms in the fuel pump did the trick. I'm still curious about the fuel press/vacuum and clear tube tests. I have all the gear now I'll measure that soon to verify it's correct and at a minimum set a baseline...

As I re-read the original location I realized that the sender is actually on the Port bracket vice starboard. Directly over the trim pump motor. I believe it can only be accessed with the motor up. I worked on it out of the water so it was fairly easy to see. The arm on the sender is approx...

Update. New fuel pump diaphrams show up today. While waiting on parts I pulled the carbs and cleaned. I picked up the boat in Feb and figured I see how the carbs looked to at least establish a baseline there. They looked good. The look better now, but don't suspect that as the problem. Reassmbly...

No fuel injectors. V-6 w/ 3 double-bowl carbs. Typo above: the engine is actually a 1996 Yamaha 150 saltwater series II.

Hi - New to the board. Search had great info, but just not exactly my setup. I've got an Escape 209 with a 95 Yamaha 150 SW2. I've lost about 600rpm off my top end. It's used to put out 5300-5400rpm and now tops out at 4700. Starts, idles, and runs strong right up to 4700 then stays there...

I've got a 95 209 with a 96 150 as well. Had the same issue and fixed last weekend. This sender, located as noted above, works with a spring which compresses as the engine is trim down and releases as the engine goes up. Likely you'll just need to inject some lube (I used T-9) and work it by...