duo-prop size

[Knot Now]

Glen,
I would like to try your A4s
Phil

[JOHN PINTO]

Hi guys: Glen (wizard) first of all, I would like to thank you for your most generous offer to let me borrow your A-4 props. I think what I'm going to do is buy the A-4s and since I have the A-5s already I'll experment with both and keep the one that works best on the boat and the other for the spare. And that way I can also show the same generousity as you have if someone has to decide between props. Second like Yellowfin1, I do not like to push my boat past 3400 rpm's. Even though my engine manuel says I should go to max throttle (4000rpm) then back off 300rpm. I get very nervous when the temp needle starts going beyond the 200 temp mark. Thanks Jack (socorro)

[Wizard]

I have a KAD 42B, super and turbo, running A-5s. Runs like a banshee, on plane in 5 seconds, but stupid temp alarm starts going off at 185 degrees, 18 knots, fully loaded, now that the water temp avg is over 70 out there, annoying. Ran at 24 knots at 3400 RPM and never got over 180 in early spring when water temp was in the low 60s. I go up to 3400 RPM and it runs at 190 degrees. At 3800 RPM I can do over 26 knots, but temp goes to 200 too easy. Top speed ever ran was 31 knots for a few seconds, but temp runs away. Still trying to re-figure all this sh*t out again, since taking out my 42A motor and replacing with the 42B last winter. Solution: Disconnect alarm.. LOL


Still amazed you get almost the same performance out of a 4 cylinder that I get out of a 26' Billfisher that started with a 40 or 41, and now has a 42 that fits so tight, you have to take off the water pump to change the impeller.

[Knot Now]

I guess your making a lot more HP. LOL My Temp never goes over 160. I ran back in from the 182 today at 3300-3400 rpm running 20-21 knots with my A3s (1:1.78) gear ratio. Not sure I can swing A4s. Boat "dances" at 20 knots, sure would like to be able to run 24 knots, but thats not ging to happen.
Phil