Finally pulling the trigger
 

I finally decided to upgrade my engines. Am pulling out 496 mags (375hp) each & replacing with 650hp 540s. Anyone have an idea what I can expect speed wise? The boat is a 2007 Kachina 34 Bolero with 1.50 Bravo xr's & -2 speedmaster shorties with a 1" spacer Bravo1 4blade 28p labbed props. The boat will run 70mph @ 48-4900 rpms. BTW I remembered why I dont fix boats for a living anymore. LOL. Randy

did you get 540s already

Not in hand yet, I will be trading my 496s when I get them out.

RANDY,i would look for 13 to 15 mph gain after it is proped right,enjoy.ps,this is asuming the new engines make the 650 hp.

Mike, what would your guess be for props?

i would start with out of the box 30p bravo ones.

Thats about what I figured, was suggested to try maximus 5 blades labbed but I've heard they are hard on the drives

i agree,but it also depends on how u drive it.

Well......I learned the hard way about hole shots so I dont do that but with the current setup I have a lot of prop slip until it planes but I can throttle back & cruise at 28-3000rpms where as I couldnt with the stock bravo28s. I do like to hammer down once in a while but the oil companies are keeping me in check. LOL. Randy

Cleaning
 

The engines are out & the bilge is filthy go figure, after scrubbing with dish soap & a pressure washer I was only 1/2 way there. Went to the parts store & asked for the best degreaser they have. Its called Super Clean & WOW does it work! Ran out of daylight but I got most of it, will finish up tomorrow. Randy