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| Surface drive (drive and driven pulleys) http://mudmotortalk.com/mmt_v2/viewtopic.php?f=2&t=65864 |
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| Author: | Marque [ Tue Feb 16, 2016 8:05 pm ] |
| Post subject: | Surface drive (drive and driven pulleys) |
Just wondering what diameter the drive and driven pulleys are on the most popular surface drive setups? |
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| Author: | Gigafowl [ Wed Jun 08, 2016 4:43 pm ] |
| Post subject: | Re: Surface drive (drive and driven pulleys) |
To add to what I sent you by PM From memory they all have an rpm reduction from motor to prop... "gearing" is a combination of reduction and prop pitch.... PD used to be 1.5 to 1 when they ran a 12 inch 12 pitch on 36hp GT used to be 1.2 to 1 when they ran a 10 inch 10 pitch prop on 35hp GD is still 1.4 to one when running a 12 inch 12 (maybe 11 1/2) 3 blade on 35 and 37EFI engines Final gearing with these props is virtually identical ! The exception is MB who offers a host of modified engines and a variety of ratios |
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