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  1. Replies
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    Let me walk back on the last post. If the hose...

    Let me walk back on the last post. If the hose you are replacing is on the bellhousing and it connects to the transom, then yes, you will need to take the complete drive off to replace that hose....
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    There is no need to remove the drive to replace...

    There is no need to remove the drive to replace that hose. It is connected to the transom assembly on the inside of the boat, then it connects to your water pump on the motor.
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    Hello, It could be a gimbal bearing or a...

    Hello,

    It could be a gimbal bearing or a bearing for the input shaft on the upper unit. It would probably be best if you had a marine mechanic take a look and see which one the noise is coming...
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    Hello, It is possible the flow of water from...

    Hello,

    It is possible the flow of water from your hose isn't sufficient enough. Try putting it in the water to see if it gets better. If your boat sits for long periods of time, this can have an...
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    The parts are not interchangeable from a Gen 1 to...

    The parts are not interchangeable from a Gen 1 to a Gen 2 or visa versa. Serial number 0M490785 is a Gen 2 Alpha drive.
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    Hello. The serial number just tells which drive...

    Hello. The serial number just tells which drive it is, Alpha One Gen 1. It does not give the gear ratio. The easiest way to tell is to take off the top cover on the upper and count the teeth on the...
  7. Hello. Looking at these pictures, it does look...

    Hello. Looking at these pictures, it does look like you need a complete replacement. This is some very bad corrosion which I suspect is caused by electrolysis. The boat may have been kept in the...
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    You would need the SE106 drive. A 260 engine...

    You would need the SE106 drive. A 260 engine would typically use a 1.47 ratio, but since it is a 26 foot boat I would verify what ratio you have as they sometimes used a 1.32. The best way to verify...
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    It sounds like you have done everything I would...

    It sounds like you have done everything I would recommend trying. It is probably time to call the warranty department at 813-925-7127

    Tech Support
  10. Replies
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    If you are just changing the lower without...

    If you are just changing the lower without removing the upper you can just reuse the old shift shaft. They are interchangeable.

    Tech Support
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    I normally just use a thin film of any type of...

    I normally just use a thin film of any type of grease, although something water based would be best. You want to turn the shaft clockwise when installing the impeller.

    Tech Support
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    That is correct, new units do not require the...

    That is correct, new units do not require the o-ring. It was redesigned many years ago.

    Tech Support
  13. Replies
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    The side to side play is normal. The gears are...

    The side to side play is normal. The gears are designed in such a way that the drive shaft will try tu go straight up under a load. If you pull up on the driveshaft you can simulate a load and you...
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    I don't think it is possible for the shift cable...

    I don't think it is possible for the shift cable to move too easily. The tension that trips the switch comes from the lower unit as you are shifting out of gear. It only works under load as...
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    The Trim limit switch and Trim indicator are...

    The Trim limit switch and Trim indicator are sealed pieces only available in a kit. Most people will replace them when they are doing a bellows job as you have to tear down the transom assembly. It...
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    It will not bolt up, although the transom cutout...

    It will not bolt up, although the transom cutout is the same. You could convert, but that would require a new transom assembly as well as all of the engine componets such as the flywheel, exhaust...
  17. I would think 3 hours if you have never done it...

    I would think 3 hours if you have never done it before and everything goes well.

    Tech Support
  18. Replies
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    I would first check the gimbals to make sure they...

    I would first check the gimbals to make sure they are not worn out. Try to swivel the drives while the boat is on land and see if there is alot of slop. Usually the gimbal ring wears at the upper...
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    If you look on the upper units on the port side...

    If you look on the upper units on the port side where the sticker is, you should see the ratio stamped there.

    The port side is often Counter Rotation, but not always. The easiest way to check is...
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    You should need the 1.84 SE 106 old style. Verify...

    You should need the 1.84 SE 106 old style. Verify the length of the yoke before ording though.

    Tech Support
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    if it is not getting worse it shouldn't be the...

    if it is not getting worse it shouldn't be the coupler. There is no way of checking it until it lets go completely. Usually at that point you will smell burning rubber.

    You might want to cunsult a...
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    Once per year or every 100 hours, whichever comes...

    Once per year or every 100 hours, whichever comes first.

    Tech Support
  23. Replies
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    It sounds like your engine coupler is slipping....

    It sounds like your engine coupler is slipping. It must be just starting to fail. If it seems like it is getting worse, then I would suspect it for sure. Typically the coupler will hold until you...
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    You have to remove the drive, then you will be...

    You have to remove the drive, then you will be able to see the grease zerks on the u-joints.

    Tech Support
  25. Replies
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    Typically if the engine will start but not go...

    Typically if the engine will start but not go into gear that means something is going on in the lower unit. You can also pull the top cover and check the upper gears. If it is still under warranty...
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115 S. Forest Lakes Blvd.
Oldsmar, FL 34677

tel: 813.925.7127
fax: 813.925.7064


Sterndrive Engineering, Inc. (SEI) manufactures a stern drive designed to replace Mercury Marine's MerCruiserŽ Alpha OneŽ, R, MR, Gen II and Bravo OneŽ stern drives. MerCruiserŽ Alpha One, R, MR, Gen II and Bravo OneŽ are trademarks of the Brunswick Corporation. SEI has no affiliation with the Brunswick Corporation. Consequently, any warranties governing products and or sold by Brunswick Corporation will not apply to products manufactured and or sold by SEI, or to products damaged due to the operation of an SEI product.