Where was the missing 500 rpm?

Compression Test: Good
Spark Plugs: Good
Timing: Good
Engines Running: Sound Normal

Thinking maybe spring pressure is compromised? I'm going to run it this season as is and have Wesco go through the motors in the Fall. I want to go boating. I'm not going to push the boat this season. It seems to run fine but power starts to fall short of normal around 4500 rpm. I'm not sure what's going on. I'd imagine the valve train is tired (300 hours on motors). Dave didn't want to get too specific until he tears into the motors because we don't know for sure.

Do you have a way to check fuel pressure while your out on the water?

Not on the helm but on the fuel rails to the carbs. I guess i could run the boat with the hatch open and observe the gauges.

Or a gopro or similar recording the gauge!

Not a bad idea but I better start saving my nickels for the engine rebuilds. I’ll just old school it and raise the lid:D

Power is back to normal, WTF! I think the plugs were fouled, I’m a dumbass🤣

I’ve have nothing but great respect for Dave. He was always there when I was having problems and helping me work the bugs out of my motors after I bought my boat. Finally after I had him rebuild both motors I could be on the water trouble free.

https://cimg4.ibsrv.net/gimg/www.off...34e9b1bb0.jpeg

Dave is the man!