Mounted Boyesen two stage power reeds on my Mercury 55 Sea Pro on a Gemini Zapcat. I tested performance before going from stock reeds to Power reeds. I got 61,1 mph at 6100 rpm's. This is a often seen performance with this setup. Motor is stock only rpm limiter cut. I was spinning a Merc. 12X18 TH cleaver.

The test results with Power reeds were disappointing. I achieved 57,5 mph at 5700 rpm's.

Further more I had a idle rpm raise to 1100 rpm's. And I had a motor stop when going from full throttle to idle. The engine would start immediately Again.

I'm about to go back to stock valves again but would give it a try for a good advice here.

Regards Brian