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-   -   New Cummins/Mercruiser Project (https://www.offshoreonly.com/forums/general-boating-discussion/196140-new-cummins-mercruiser-project.html)

29Firefox 10-13-2008 03:03 AM


Originally Posted by shueman (Post 2713414)
Drivetrain will start with 1.35 gears and labbed 38p 5-blades, targeting 75-80mph running speed...

How ya gonna get her out of the hole?:drink:

HabanaJoe 10-13-2008 06:34 AM

The drives are 1.35 but what are those boxes on the back of the engines are they a tranny or crash box? If so is there a ratio in there?

steelhorse 10-13-2008 10:30 AM

serous engine.. lots of torque

http://photo-shack.com/img/37f0e884f...169d0a3c95.jpg

Jassman 10-13-2008 07:10 PM


Originally Posted by obrien (Post 2713670)
The boat is looking good. I am curious to see how this combo works out.


We should take bets...My guess will be 78.6 mph

Comanche3Six 10-13-2008 09:59 PM

84mph

Hot Knots 10-13-2008 10:29 PM


Originally Posted by steelhorse (Post 2714035)

...which is why I wonder about the drive choice. Is the NXT strong enough to handle 1200-1400ft lbs torque?

stainless 10-13-2008 10:39 PM

75mph

obrien 10-14-2008 09:21 AM

what diameter props are you going to start with?

29Firefox 10-14-2008 03:22 PM

Which ICAL template did they set up the ECM with?:drink:

29Firefox 10-14-2008 03:30 PM


Originally Posted by stirling (Post 2707404)
On my other diesel boat ,a Sonic 28 with a Yanmar 6 LY ,I needed a bellhouse for a bravo to yanmar 6LY ,I called a lot of people in the US ,and did a lot of search ,but could not found a bellhouse ... I used a tailstock and a special made splined adapter to make the connection between enginea and drive,I was thinking about making one from a solid plate ali
If I only knew where to buy one back then...


Originally Posted by 29Firefox (Post 2708059)
6LY series engine has a industrial SAE #3 flywheel & housing setup. Cummins 6BT has a SAE #3 housing set up and is sold in a sterndrive package with a bravo out drive:drink:

Look at the pictures above. Notice the bell housings are designed to hook up to a Merc inner transom plate.:drink:


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