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Reduction gear ratio for 3GM30F

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Tom S.

Anyone Know the reduction gear ratio for the Yanmar 3GM30F on a 356? I'm trying to order a Kiwi Prop, and their websight is asking for this info. From the yanmar site I found 2.61 for 16" props and 2.36 for 15". My boat came with a dealer installed 15x13 three blade prop, so do I assume 2.61?
 
Jun 4, 2004
803
Hunter 340 Forked River, NJ
Transmission Plate

There is a small plate on the side or rear of the transmission with the Make, Model, Gear Ratio, Lube requirement, etc. The 3GM30F in my 2000 H340 with the original 16" two blade prop has a gearbox with a 2.61 ratio.
 
Mar 20, 2004
1,616
Hunter 356 and 216 Portland, ME
gear ratio for a 356

Tom, I think you have the ratios crossed in your post.... Our 2002 356 came with a 15" prop and the ratio on the transmission plate is 2.62. Sometime in 2003 Hunter changed to a 16" prop and changed the gearing as well. Chuck Wayne H356 WWW.Escape
 
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Tom Chastain

Ron, specifics please

Ron, I would like to order the Kiwi for our H-356. Can you give me the order number, approximate cost and any advise about the installation. Thanks
 
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Tom S.

Hunter's Response

Talked with the guys at Hunter this morning and they said that all the 3GM30F engines on the 356's are geared at 2.62, just like Ron said. I then called my dealer and they informed me that they don't mess with the trans. when they re-prop new boats. John Marchant, from KIWI Props North America, (250-715-6450) says I should have my prop in a week. Tom C., mine will cost $1300 with express air ($50 additional). Kiwi's web site gives you all the info you need. Just Google "kiwi props" to find it.
 
Mar 21, 2004
2,175
Hunter 356 Cobb Island, MD
Hey all you guys with Kiwi props

The rest of us will be wanting updates on how well the installation went, and how well it performs. Jim S/V Java
 
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paul

kiwi

installation was a snap. the kiwi people were very good to deal with. performance is wonderful under sail, still fine tuning under power. won't know more now until spring, since the water is turning hard here for a few months.
 
Mar 20, 2004
1,616
Hunter 356 and 216 Portland, ME
356 ratios

I should know better than to repeat what my dealer told me when he installed the 16" prop he supposedly got from Hunter.......
 
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