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  1. I am looking for some advice. I'm having a strange problem and I think it might be the fuel filter from the tank (not the water separator). I was running the boat on Friday at varying speeds. Spent some time at full throttle, and half throttle on Lake Michigan (<1ft waves). I also spent some time at 1100 RPM on the Milwaukee river. After an hour I left the river back onto the lake, and after about 5 minutes at full throttle the engine just shut down. The engine restarted right away and as long as I kept it under 2300 RPM I was fine. As soon as I went over that RPM the engine would shut down, but restart again right away. I've never had the guardian kick in before, but I thought it just governed your RPM not allowing you to go over a certain point. Does it shut your engine down? I have a Garmin 741 connected to my engine. There is no check engine light and all of the gauges look normal except the Fuel PSI which is reading 90 PSI even at idle. Am I correct that fuel PSI should be about 43 PSI at WOT? I'm guessing that the engine is shutting down because of lack of fuel, but it doesn't sound like its starving before it quits. My first guess is the fuel filter and I will change that out first. Does anyone have any other thoughts? 2002 Mercruiser 8.1L 496 / Bravo 3 Thanks for the Assist.