standard rotation drivetrain in a nautiquie?

[sanddragon2004]

has anybody ever done this on the older boats?

I have access to a few hp small and big blocks but all are standard rotation motors.

i wondered if this would affect the performance of the boat?

i can prob put together a drivetrain for half the price of a RR drivetrain is why i ask.

[Mikeski]

RE: standard rotation drivetrain in a nautiquie?

A friend did the opposite in his Centurion when he found a good rebuilt Nautique motor for cheap. It seemed to work fine.

[Mikeski]

RE: standard rotation drivetrain in a nautiquie?

You will need to replace the motor, alt, circ pump, trans, and prop. The trans is often the determining factor as it can cost more than a rebuild on the motor.

[882001]

RE: standard rotation drivetrain in a nautiquie?

i asked the same q. from what i understand just pull the pump in the tranny and flip it over and reinstall

[882001]

RE: standard rotation drivetrain in a nautiquie?

your distributer and starter wont work either.

[TRBenj]

People have put LH motors in older CC's before. They tend to list a little more toward starboard since the prop no longer counteracts the driver's weight.

If you simply want to drop a standard rotation motor in a boat that was previously reverse rotation, its not a huge task. You'll need a proper starter, a LH prop, and to reindex the pump in the tranny (as 882001 mentioned). I believe the alt can be used in either direction. You wouldnt necessarily need a new raw water pump- if youre dealing with a small block Ford you can simply flip it around.

If youre trying to convert a reverse rotation motor to standard rotation, that gets a little more tricky. The blocks themselves are the same. Depending on whether the wick lines are on the crank or rear main seal, you may need new rotation-specific pieces. You'll need a new distributor gear and a new cam, in addition to the starter and prop previously mentioned.

If youre simply building up a motor, reverse rotation parts are readily available. They may be a little more expensive, but theyre certainly not double the cost of standard rotation equivalents. Once you factor in the cost of a new prop and starter, plus the difference in the boats performance (it was designed with a RH prop for a reason), the clear advantage lies with the reverse rotation motor.

[WakeSlayer]

I am not super excited about the decision to switch the rotation of the motor on the new boats. The biggest reason is safety. You should always have the rider in the water on the drivers side when approaching them. You can approach fairly quickly, hit reverse, and the back end of the boat will pull away from the skier, not over the top of them. Correct Craft, I believe, was the originator of this, and nearly all other boats did not employ this. I realize they are out of 351's, and had to switch the base blocks to another style, but the LH rotation bugs me......

[TRBenj]

I realize they are out of 351's, and had to switch the base blocks to another style, but the LH rotation bugs me......

The change from Ford to Chevy didnt correspond to the change in props- both motors have been used in their standard (LH) configuration since the introduction of the 1.23 tranny. All the direct drives still turn RH props. The switch was only made on the V-drives... I assume that had something to do with either hardware issues or the desire to conform to the rest of the industry. I believe counteracting the weight of the driver is the biggest reason for the RH prop, which may be less of an issue on the larger boats running at slower (wakeboard) speeds.

[WakeSlayer]

thanks, I did not realize it was only the tranny.

still bugs me....

[sanddragon2004]

the reasoning behind me asking about this is I have plentiful access to transmissions and engines of the standard rotation. inlcuding all parts nessicary.

I could easily build a 400+hp full roller small block ford or chevrolet.

My main question was the performance of the hull. I have been driving mastercrafts for the past 10 years and know how to drive a standard rotation fairly well. but i didnt know if maybe the hull was designed a specific way to cater to a reverse rotation motor.

Right now i have access to a 330hp Rrotation 351w motor which i may put in the winter.

but also have easy access to an efi standard roation motor.

[sanddragon2004]

velvet drives have a reverasable pump. you simply reverse the rotation on the pump to change the output. or unbolt 4 screws and turn the front pump houseing upside down.