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-   -   what would happen if????? (https://www.offshoreonly.com/forums/general-boating-discussion/206817-what-would-happen-if.html)

noyzee 04-13-2009 12:02 PM

what would happen if?????
 
you put a right hand rotation prop on a LH rotation motor??

JaayTeee 04-13-2009 12:12 PM

.....depends on which way the drive/shifter was set up to run.

Bob280Silencer 04-13-2009 12:27 PM

forward would now be reverse and rev would be forward.Think backwards.

noyzee 04-13-2009 12:41 PM

so for sure it would spin backwards without question? if the motor says LH and the prop says RH you will go backwards in forward.
this is what i was thinking, but im not sure if its correct. so u say yes.

1 for correct. anyone beg to differ?

sellsman11 04-13-2009 12:48 PM


Originally Posted by noyzee (Post 2842984)
so for sure it would spin backwards without question? if the motor says LH and the prop says RH you will go backwards in forward.
this is what i was thinking, but im not sure if its correct. so u say yes.

1 for correct. anyone beg to differ?



That's a no-brainer. (so I am qualified to answer!):evilb:

Forward would be reverse....reverse would be forward. TRUST ME!! I've done it.

OkieTunnel 04-13-2009 01:07 PM

On alot of shift mechanisms it can be flip-flopped just like JaayTee said. It therefore doesnt really matter what the respective rotations are in many instances, just how it is set up to shift. For instance, I once had a single engine cat that
I was trying props on. I tried at least one that was opposite the rotation of my drive. Prop was tested with shifter in reverse position. If I had liked that prop I could have ordered the same prop in reverse rotation or switched how my cables shifted. When a boat owner with twins try's "spinning them in" or "spinning them out" thay are going through this same process. They are swapping the props from one side to the other and changing how the boat shifts.

JaayTeee 04-13-2009 01:08 PM


Originally Posted by noyzee (Post 2842984)
so for sure it would spin backwards without question? if the motor says LH and the prop says RH you will go backwards in forward.
this is what i was thinking, but im not sure if its correct. so u say yes.

1 for correct. anyone beg to differ?

You failed to mention what type of drive it was.


If we're talking sterndrives, the engines all turn
l/h.....that's not an issue.

If it's a transmission boat TRS, NXT, SSM, the drive determines the rotation.

If it's a Bravo, the shift cable position at the shifter at the
helm determines the rotation.

If installed incorrectly on a transmission boat,
transmission damage can occur, and the shifter will
operate backwards.

If installed on a bravo, with the shifter set up for r/h rotation
it will go forward when the shifter is in forward

If installed on a bravo with the shifter set up for l/h rotation,
it will travel in reverse in the forward shifter position.

Gladhe8er 04-13-2009 02:56 PM

This happened on my Dads Checkmate. He thought he would use a prop from his 81 Checkmate on his 98 'mate and apparently the shafts spun opposite. We went backwards when we tried to go forwards.

AIR TIME 04-13-2009 04:46 PM


Originally Posted by JaayTeee (Post 2842994)
You failed to mention what type of drive it was.


If we're talking sterndrives, the engines all turn
l/h.....that's not an issue.[quote = airtime true thats why when you see right hand motors for sale in boating mag or boat show they are more money:rolleyes: cause the standard motor is the left hand, and I agree on the rest:ernaehrung004:

If it's a transmission boat TRS, NXT, SSM, the drive determines the rotation.

If it's a Bravo, the shift cable position at the shifter at the
helm determines the rotation.

If installed incorrectly on a transmission boat,
transmission damage can occur, and the shifter will
operate backwards.

If installed on a bravo, with the shifter set up for r/h rotation
it will go forward when the shifter is in forward

If installed on a bravo with the shifter set up for l/h rotation,
it will travel in reverse in the forward shifter position.

very well done:ernaehrung004:

noyzee 04-14-2009 08:22 AM

i was confused and speaking with a friend. my motor in my boat says lh rotation. he said that meens my prop is wrong and i should have a lh rotation prop thats why im hitting the limiter. i begged to differ and said it must be lh rotation motor with rh rotation drive Bravo1x. because if it was lh and i put a rh prop on it i would go backwards. he saw it diffrent then me.
you guys firmed me up that i was right. theres no way it will run with a rh prop if its lh rotation. so my prop is correct.

Big Time 04-14-2009 08:26 AM

It would be a good way to mess with you buddy if you wanted to, that is until he smashed the front of his boat into the dock thinking he was going to back out! :evilb:

JaayTeee 04-14-2009 08:33 AM


Originally Posted by noyzee (Post 2843726)
i was confused and speaking with a friend. my motor in my boat says lh rotation. he said that meens my prop is wrong and i should have a lh rotation prop thats why im hitting the limiter. i begged to differ and said it must be lh rotation motor with rh rotation drive Bravo1x. because if it was lh and i put a rh prop on it i would go backwards. he saw it diffrent then me.
you guys firmed me up that i was right. theres no way it will run with a rh prop if its lh rotation. so my prop is correct.

Now that you mention bravo drive,
if you push the shift lever forward and the boat
goes forward...you're set up correctly for
the rotation of prop you currently have on it.

noyzee 04-14-2009 08:53 AM


Originally Posted by JaayTeee (Post 2843738)
Now that you mention bravo drive,
if you push the shift lever forward and the boat
goes forward...you're set up correctly for
the rotation of prop you currently have on it.

yea, i thought so, but he had me 2nd guessing my set up. lol
lh rotation motor but rh rotation prop/drive. from what i could tell this is kind of the norm on most single screw boats.


big time. i was thinking of getting the cheepest LH and putting it on his boat just to mess with him and prove a point, but he doesnt have a boat. lol if he gets one tho, its on my list of things to do. i will keep an eye out for a cheep **** prop. lol


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