A4 slipping
I thought I had a tranny problem too. I could not get more than 3 knots out of her - it sounded like she went into neutral at higher revs.
The problem was that there were barnacles on the prop! It doesn't take too many of them to cause a disruption in the water flow.
Get down into the water and check it out. I just scraped them off and added some lanolin to help prevent new ones. It worked like a dream.
I hope this simple solution works for you too.
Norm
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