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Generally, no, you need not remove the drive to take the engine out. You need only disconnect the control cables, wiring, plumbing and exhaust boots and the engine mounts.
The engine must first slide forward in order to clear the input shaft on the drive and then can come up and out. Usually this is done by lifting only enough to take the weight of the engine off the boat...don't need o lift more than just a fraction of an inch. Then you can either roll the boat and trailer backward if your lift is fixed, or if you are using something like a tractor with a loader bucket, roll the bucket forward. Once off the rear mounts and free of the shaft the engine can come out. Usually there is at least one thing you forget to undo!
Your way, my way.
- Ayuh,.... That would be the Right way, 'n the Wrong way... The drive Has to be Off to reinstall the motor anyways....
- Btw,... Rick, I've been callin' engines, Motors all my life... Right wrong or otherwise.... 'n Yes, I do know the difference....