2FORCEFULL
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Where are you seeing this "R?"
I don't think it would matter to the drive if it was right hand or left hand rotation as you could just run it in reverse? (Switch the cables up at the controls)
RD
Where are you seeing this "R?"
I don't think it would matter to the drive if it was right hand or left hand rotation as you could just run it in reverse? (Switch the cables up at the controls)
RD
Only if you want to blow up your drive. Many bravos have helical (?sp) cut gears and are only designed to run one direction.
that was my next question... when i had twins, people would say, swap the props and run them in reverse....
first time I noticed the "R"... it stamped 1.50 R
....
Here's my thought on the foward reverse deal. I noticed on twin motor boats turning in the port side drive is usually the one that fails. That's spinning in the normal rotation, the starboard is spinning in "reverse". The port side drive is using the upper gear, with the cap holding it in for support, the starboard is using the bottom gear with the base of the driveshaft housing supporting it. Maybe it's just coincidence, but they seem stronger using the bottom gear.
No it does not stand for right hand, The "R" after the 1.50R Is the gear RATIO of the drive.
You guys do understand there are two gears? One on top and one on the bottom. They work both directions straight cut or not. The motor spins the same direction, the input shaft spins the same direction. Both gears always move in the same direction. The clutch either engages the bottom or top gear to change the direction of the upper driveshaft. Mercury does not make a reverse rotation Bravo. You can switch the direction with the shifter.
Outdrive , my only concern to 2Forcefull's drive was if he had helical gears in his bravo1 drive behind a healthy engine .Helical gears have higher sideways thrust loads (axial loads) and slightly lower efficiency than straight spur gears, hence my suggestion to replace the cap.
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Dumb Question, what about single engine Fountains ?
Didn't BK Reggie set up everything lefty ?
Special drives ?
Is there more upper failures than bottom gear failures , unless one hits a log or sandbar , of course ? I think Merc reinforced the upper bearing cap for X models because of the side load . Seen unworn upper gears with missing teeth on them .
They run either way. I just called to ask my Merc rep if they even sell a reverse rotation Bravo 1 and they do not.
You guys do understand there are two gears? One on top and one on the bottom. They work both directions straight cut or not. The motor spins the same direction, the input shaft spins the same direction. Both gears always move in the same direction. The clutch either engages the bottom or top gear to change the direction of the upper driveshaft. Mercury does not make a reverse rotation Bravo. You can switch the direction with the shifter.
The bottom gear is helical also, it still turns the correct way.
Here is a visual display to make it easier to understand
:thumbsup
Here is a visual display to make it easier to understand
Hmmmm i'm not sure what you mean by this. And i'm not sure if your confused by OD1 said about upper and lower gears, or if you are actually asking a completely separate question.
This is what is meant by Upper and Lower Gear, as you can see they spin opposite directions naturally, by engaging the clutch that locks that gear to the down shaft you control direction of the downshaft, No shifting takes place in the lower unit.
This same theory is how TRS, III, IV, V (i'm not sure about VI) drives reverse rotation, they do it in the lower unit, if the drive is set up with the prop shaft gear IN FRONT of the down shaft it spins one way, if it's set up with the prop shaft gear BEHIND the down shaft gear it spins the other way.... there are only 2 gears in the lower unit, not three, so it looks similar to this (but no clutches and one gear isn't there, depending on which gear isn't there is LH or RH rotation)
So are you still asking about lower unit gears breaking? because that's a completely different issue than shifting and LH vs RH.... :thumbsup