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Old 01-26-2013
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PSC34 Gear Reduction Ratio

I have a Yanmar 3JH2E engine on my 1994 built PSC34 #274. The tag on the marine gear box reads Kanzaki model TuffTorq #WMGP4. I need the gear reduction ratio for ordering a fixed 3-blade prop. From all what I read in the forum I would assume the ratio is 2.14. Does the tag information contain any coded information about the ratio?
Thanks for your help.
Wolfgang
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Old 01-26-2013
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Re: PSC34 Gear Reduction Ratio

TuffTorq #WMGP4

That turns up tractor parts, can't find that number under any marine Kanzaki gear listings...
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Old 01-27-2013
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Re: PSC34 Gear Reduction Ratio

Hi Wolfgang,
We have hull number 279 with the same engine that you have. Our transmission is a Kanzaki model KBW10 with a 2.14:1 reduction ratio. It is embossed in the label.
Neal
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Old 01-27-2013
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Re: PSC34 Gear Reduction Ratio

Thanks Neal. That gives me more ease to believe that the gear box on Yankee has a reduction ratio of 2.14 too. I also checked my original Pacific Seacraft manual. In the propulsion chapter it does not list neither the Yanmar 3JH2E engine, nor the Austral 17 x 10 2-blade prop, nor the 1" shaft diameter, nor the 1"x1.375"x4" cutless bearing, nor the stuffing box, but a reduction ratio of 2.14 for the gearbox. I do believe now that it might be correct and not just a copy/paste information.
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