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Old 14 July 2016, 14:47   #21
Country: UK - Scotland
Make: HumberOceanOffshore
Length: 8m +
Engine: Volvo KAD300/DPX
Join Date: Oct 2002
Posts: 4,850
Originally Posted by vdubr928 View Post
Being a Hydrostatic drive, this is impossible. It sounds like I have a 1.50:1 setup since I have a petrol engine.

Edit, This was already mentioned above. Not sure why i didn't see all the posts when I came in this morning,
Yeh, sorry about that, I wasn't thinking straight. If you really need to know the ratio, you could use a strobe and adjust the flash speed until the prop appears stationary, record its speed then do the same with the engine and then divide engine speed by the prop speed. The boat needs to be out of the water, of course. Probably academic I guess since you are sure it's a 1.5 - 1 drive.

jwalker is offline   Reply With Quote
Old 14 July 2016, 15:39   #22
Country: UK - England
Town: southampton
Boat name: hydradrive
Make: yamaha
Length: no boat
Engine: sterndrives
Join Date: Sep 2012
Posts: 289
All petrol 6u1 hydradrives 1.5.1 ratio why are you thinking about changing the drive . Parts/ No service back up ?

yam man is offline   Reply With Quote

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