Albin Velvet Drive
- Thread starter Fish53
- Start date
The friendliest place on the web for anyone who enjoys boating.
If you have answers, please help by responding to the unanswered posts.
If you have answers, please help by responding to the unanswered posts.
jleonard
Guru
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You need the model number off the data plate on the tranny.
kchace
Guru
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- Sep 29, 2013
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- Shalloway
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- Defever 44, twin Perkins
Its probably in the 2-2.5 range but if the plate is missing then you really don't know. One possible way to find out is to use a photo tach on both the engine and the output shaft. While cruising along, "shoot" the engine speed and then the shaft speed.
They aren't cheap but maybe you have one or want one or have a friend who has one. Harbor freight sells one for $40. Don't know the quality, They usually sell for ~$100.
Ken
They aren't cheap but maybe you have one or want one or have a friend who has one. Harbor freight sells one for $40. Don't know the quality, They usually sell for ~$100.
Ken
That's probably the route I need to go, or I can wait until I haul out next month and can see what pitch and diameter my wheel is and work back from there. I have two spare Velvet Drives at home, a 71c 1.88 to 1 and a 72c 2.57 to 1, it would be nice if I accidentally had a spare on hand. I guess I could ask what pitch and diameter props others are using?
Some things from HF are great value... some not so much. I bought the digital tach there. It worked really well the first few times I used it, then was consigned to the recycling as it quit altogether.
Don't expect to get more than what you pay for.
rslifkin
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- Hour Glass
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- Chris Craft 381 Catalina
Can't do that with a Velvet Drive. They're hydraulically engaged, so if the engine isn't running, there's no pressure and it won't go into gear regardless of what you do with the shifter.
psneeld
Guru
Oops sorry.....
C lectric
Guru
These laser pointer photo tachs can be had from Ebay for $15 to $20. They are accurate and will last long enough to do the job.
Just raise the engine rpm to somewhat over 1,000 rpm or the engine may actually bounce enough to cause an inaccurate enough reading to sort out the revs. The meter will read that bounce.
Just raise the engine rpm to somewhat over 1,000 rpm or the engine may actually bounce enough to cause an inaccurate enough reading to sort out the revs. The meter will read that bounce.
Cigatoo
Guru
Photo tachometer is the way to go. I had a boat with a gear specifically stamped 2.5 to 1. When I measured it with a tach things didn’t jibe. I called the company that sold the gear and they said that they are always changing ratios. Sometimes they forget to change the stamp.
