Update!!!
 

Unbelievable! After 30 years of nose cones, one falls off and I pull the other one off and go back to stock. Got 400 more RPM and 4mph more! Wish they would have fell off sooner! So all you Volvo guys skip the cones! Got 5500 RPM and I think we could go up to a 21 inch prop if they made one for the long hub Volvo. Anybody got any ideas? Running 14.5 x 19 right now.

Thanks,

Jeff

mmmmmmm . .. .

Jeff,
What is your power?
My boat has two 465 HP 377 Cu In with Volvo 280 drives and nose cones, raised 2" on 29.5" centers, I run two of Grizzly's last Solas props, spinning out 15.5" x 21 and run 77 mph at 4400 RPM in glass smooth flat water . . Sadly I can't tell you if this was WOT as I wasn't paying attention to throttle position . . DOH!

Mario L.

Mario,

Running two Chris Craft 350's about 350-375 HP each. Getting 5500 RPM with 14.5 x 19 props. Power and RPM indicates I could go bigger with the props? This would get me more mph possibly? Hitting 56 on the GPS. These boats only advertised 55mph top speed from the factory and this was with the top power package which was the "Flagship" motor package.

Thanks Mario,

Jeff

Guys,

My bad I am actually running 14.5 x 21 Michigan Stainless props not 19 pitch. Looks like my only option is Solas titan 23 Pitch. Anybody had any experience with these? They are 15 5/8" x 23 pitch. Will they hold up the horsepower?

Thanks again,

Jeff

Jeff,

the dash inserts look great , what are you using to engrave the "Magnum Marine" logo? Did you use a router tool?

Thank you
Jim

Jeff,

This what my notes say that I bought from Grizzly, but the props are labeled differently . . consider sending your props to Hale Propeller in CT or B Blades or Hydromotive
Hale did all the prop work on Mighty Mouse . . and last I knew the owner there owns a Magnum 27 . .

Mario

Calling the Sea Giraffe, come on in hallj what speed does your 27 sport pull with your engine build with the Volvo 280 drives and ?? props.

My 27 is on Bravo 1's with 383ci motors and 14.25" x 26" props but we have not been able to run it at any speed yet so what will be your guess ?

Kalaazar

Sea Giraffe here,

I haven't run it out with the raised X. Yours will do 73 or so with ease. How's the engine progress?
Just hung out with Jack Stuteville today, he remembers Your 28 race boat when he worked for Vincenzo.
You'll have to stop by next time you're in Florida.

Jeff

Mario,
What gear ratio are your Volvo 280's?

Lee,
I wish I could tell you!! My GPS speed and RPMs don't make sense with prop pitch when run through a calculator with Volvo ratios.
I bought my props from Grizzly, last set he sold that we're a matched L&R turning set. These are Solas props he had made for the old Volvo drives working with Solas and using Donzi Classics. Unfortunately the boxes are labeled differently than the props and my emails with him are different from that.

I want to trust my tachs, and the GPS........

Mario