Is the vertical shaft splined or triangular? 1 0r 2 vertical shafts?

1 shaft, splined, coupler connects the lower to the upper vertical driveshaft.

Looks very straight forward. Kurt, thanks for the info. I now have 3" of spacer, so I think another inch might help getting on plane. The 5 blade Maximus prop is a Bravo prop? Smaller diamater and more pitch? I will take a good hard look @ Miami Boat Show.

Very nice! Looks to be as clean and simple as the other Konrad packages. From our experience I've found the Konrad kits to include everything and have explicit instructions for retro fit. This is no exception.

[QUOTE=f311fr1;2369745]Looks very straight forward. Kurt, thanks for the info. I now have 3" of spacer, so I think another inch might help getting on plane. The 5 blade Maximus prop is a Bravo prop? Smaller diamater and more pitch? I will take a good hard look @ Miami Boat Show.]

Yes, the Maximus is for a Bravo shaft. The Konrad unit runs a 1.25" prop shaft with an XR style hub kit.

See you in Miami!

Kurt

Kurt
How does this affect performance?
Ed

Running box stock 4 blade Powertech 28's, we gained almost 2 mph while reducing prop slip from 22% to 15%
Definetely more to be had with a labbed for the application prop.

Kurt

f311fr1,
The Maximus Prop can be had in a 15 5/8 diameter.
I'm hoping Santa brings a pair this year since I didn't get them last year:-(.
I know they will work well with my Konrad conversion that Doller Offshore did on our boat two winters ago.
Hope this helps.

Thanks all.

steering wing plates and finished project
 

This boat started out with the propshaft 5.5" below the bottom of the boat. It is now 1.7" shorter, running 26 Hydromotive p5X's 74 MPH at 5400 RPM's.
The boat has great response getting on plane, and I will post the Stats with the Maximus as soon as we test. We estimate gaining another few MPH!

Looks like a nice conversion. What Comanche3Six asks is a good question. What are the strength (HP & Torque) differences between the Konrad 540 drive that replaces the Merc TRS and the Konrad drive that replaces the Merc SSMIII or are the Konrad drives rated the same between the two?

Kaama when I blow up the center picture above it says 540 on the drive so I assume that they are the same. I do know that Konrad does make a upgraded gear set that I did not opt for when I purchased mine but I think that they did use in these drives. I do not recall the upgrade increasing the rated HP/Torque but I could be wrong.

Both drives share the same internal components with the exception of the optional HD upper input shaft (included with the SSMIII conversion) . They are both rated to handle up to 800 hp.

The HD upper shaft option was originally designed to better handle the higher torque load (at lower RPM's) of a diesel engine. When a customer is installing a Konrad system behind power levels greater than the factory rating, the optional HD upgrade makes for a stronger unit.

Thanks for the positive input guys!

Kurt

just to reiterate, That HD upper is optional with the TRS replacement, but STANDARD with the SSMIII/
IIIA conversion drive, which also has a slightly different upper housing for bolt pattern reasons....

Kurt,
Correct me if I'm wrong: the Konrad is 2" shorter than the III, so it would be 2" longer than a IV and 4" longer than a V.
Eddie

Eddie,,

The actual dimention (of the standard lower case) is 1.78" shorter than the SSMIII. We rounded out at 2" higher

The SSMIV & SSMV (both share the same dimention from propshaft to input shaft) at 6" shorter than the SSMIII. So that would put the Konrad unit at 4" lower than the SSMV.

This conversion is not really designed to replace the SSMV but on some applications that are running the SSMV with 2-3" of spacers, (typically SSMV's w/gimbal mounted directly to transom, no boxes) could possibly be a good candidate for this package given that the smaller prop diameters would run more effieciently in deeper water.

Kurt

Do all the drives III, IIIA, IV, and V use the same Gimbal?

Yup, pretty much with the exception of the very early SSMIII's

Thanks Kurt. I knew the V was 6" shorter than the III, but I didn't know the IV was the same length as the V. Learn something new every day. Thanks, Eddie.

Thanks gang. :)

This new package really opens the door for a lot of potential installations(already working on a few) really nice to have a replacement drive for the retired 3-5 speedmasters,rebuilt units are ok but brand new units the way to go,also really helps the value of boats rigged with 3-5 speedmasters,really sucks not being able to buy new parts and outdrives.Hopefully next on list will be a replacement gimbal assy for speedmasters,only time will tell.Another great product from Konrad marine.