3270 Volvo AQ 140 prop direction-gctid808851

[seanV18]

Do both props turn the same direction in the Volvo AQ's ?????????

[2850Bounty]

OEM would have been LH on Port, RH on Stbd.

.

[seanV18]

Would you know if the rotation can be switched with a a huge undertaking?

[renog]

switching direction is very easy. You can run left hand or right hand without an issue. Unscrew the back cover 1 screw) switch the connection on the shift linkage from one hole to the other. Very simple and easy to do. Be aware your boat will turn and track different when switching from right to left hand, and you may need to move the trim tab (course deviation) to adjust for a different torque.

Oh, I see you have dual engines. You need them opposite directions, and ideally LEFT HAND on the port side and RIGHT HAND on the starboard side.

I can't think of a good reason to swap them, but you could.

The problem is you run both left hand or both right hand is you will have a boat that pulls left or right more than you can handle and will likely not back up easily.

I am not aware of any issues reversing the order, but you definitely should not run them both left hand or both right hand because you would have double torque in one direction making it harder to run the boat straight or back up.

[Ruffryder]

3270 is not a stern drive boat.

[2850Bounty]

"renog" post=809107 wrote:
switching direction is very easy. You can run left hand or right hand without an issue. Unscrew the back cover 1 screw) switch the connection on the shift linkage from one hole to the other. Very simple and easy to do. Be aware your boat will turn and track different when switching from right to left hand, and you may need to move the trim tab (course deviation) to adjust for a different torque.

[color]blue wrote:
If these were stern drives, that would be the trim fin/torque tab.[/color]

Oh, I see you have dual engines. You need them opposite directions, and ideally LEFT HAND on the port side and RIGHT HAND on the starboard side.

[color]blue wrote:
Correct![/color]

"Ruffryder" post=809109 wrote:
3270 is not a stern drive boat.

[color]blue wrote:
Joon, you are most likely correct, however, the thread title says AQ 140.

If this is an I/B boat, these would be BB 140s.

If they are BB 140s, and if he has the MS-3 or MS-4 transmissions, these are "oposite of engine rotation capable", in which case the vertical linkage rod would be switched from where it is now (at the eccentric piston) to the oposite position in the eccentric piston.... just as with the AQ stern drives.

No trim fin/toque tab involved.[/color]

.

[Ruffryder]

Rick, MS3 transmissions most likely

[seanV18]

Thanks you guys! It sounds like to switch isnt that big of a deal. My situation is this. My port engine is toast. I purchased two used engines and Im hoping that one of them can be a replacement. Havent dug into them yet but if the STRBD engine is in better shape of the two spares I made need to put it on the port side,

[Ezgoin58]

SeanV18,

The question depends on if you boat has the original crusader engines and BW transmissions. If so, the the engines were build to run LH and RH rotation. Both trans turn the same as engines.

I had that problem when I replaced mine ( almost impossible to find a RH rotation engine today unless you order special build $$$), so I got a good deal on a pair of Volvo 4.3's, and swapped out the port trans to a counter rotation trans.

So I have two standard LH newer 4.3's with one standard and one counter rotation trans. Still cheaper that having a RH rotation engine built.

Hope this helps.

P.s. changing the pump rotation on the BW trans Will NOT affect the rotation of the out put shaft. I was told that all I had to do was change the pump rotation to change the out put rotation Not True, you need a BW reverse rotation trans, they are not too $$ used.

[seanV18]

My existing motors are the same as the replacements. Volvo Penta AQ 140B

[Ezgoin58]

Also, just a thought since you will have both engine out, you might want to check your fuel tanks. If they need replacing now would be the time, since the engines will be out of the way. The fuel tank mounts can cause leakage ( design flaw, just search 3270 fuel tank here). Just trying to save you $$.

[seanV18]

Great tip! Thanks!!!!!!

[2850Bounty]

"Ezgoin58" post=809238 wrote:
SeanV18,

The question depends on if you boat has the original crusader engines and BW transmissions. If so, the the engines were build to run LH and RH rotation. Both trans turn the same as engines.

I had that problem when I replaced mine ( almost impossible to find a RH rotation engine today unless you order special build $$$), so I got a good deal on a pair of Volvo 4.3's, and swapped out the port trans to a counter rotation trans.

So I have two standard LH newer 4.3's with one standard and one counter rotation trans. Still cheaper that having a RH rotation engine built.

Hope this helps.

P.s. changing the pump rotation on the BW trans Will NOT affect the rotation of the out put shaft. I was told that all I had to do was change the pump rotation to change the out put rotation Not True, you need a BW reverse rotation trans, they are not too $$ used.

[color]blue wrote:
Great info...... however, his boat is equipped with Volvo Penta BB140 engines and most likely MS-3 transmissions.

To the best of my knowledge, Volvo Penta has never used a RH REV Rotation engine in either I/B or I/O scenarios.

The MS-3 transmission is "oposite of engine rotation" capable.

The seawater pumps are engine mounted. [/color]

.

[seanV18]

Ok now you guys have me really confused. Motors are Volvo AQ 140 B's direct drive with MS-3 tranny.

So

Can I switch prop rotation and use a starboard motor for my port side??????

[seanV18]

Bounty,

Your post implies that both port and strbrd are the same LH rotation?