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Author Topic:   Yamaha V-6 c.1995: Gear Ratio
mustang7nh posted 09-24-2004 02:32 PM ET (US)   Profile for mustang7nh   Send Email to mustang7nh  
[What is the] gear ratio on the 225-HP nd 250-HP Yamaha outboard V-6 motors 1995-1996 vintage? Thanks
Peter posted 09-24-2004 03:03 PM ET (US)     Profile for Peter  Send Email to Peter     
At one point around that time frame there were two Yamaha V-6 outbard motors of 225-HP, one displacing 2.6L and the other displacing 3.1L. I believe the 3.1L used a 1.81:1 ratio and the 2.6L may have been using the higher 1.86:1 ratio typically used with the 2.6L block. The 250 was always a 3.1L block so it should be using the 1.81:1 ratio.
jimh posted 09-24-2004 09:22 PM ET (US)     Profile for jimh  Send Email to jimh     
[Changed "Yams" to Yamaha to enable locating this article using the search engine. Use of abbreviations and vernacular is discouraged when applied to model names and products.]
mustang7nh posted 09-26-2004 04:26 PM ET (US)     Profile for mustang7nh  Send Email to mustang7nh     
Thanks Peter,

Yamaha has confirmed that as well. The larger block 225 and 250 both run a 1.81 and are identical except for the computer. A new computer is about $550 and can turn your 225 into a 250. Allegedly, the same is true for the 200 and 225 four stroke, but the 250 four is different. Don't know the computer price on the new ones, nor the difference in new purchase cost. But apparently the 200s can be 225s very easily.

Also, learned that Yam has a sticker by the started about the size of a quarter that marks the serial numbers and should match the numbers on the bracket. Just some trivia.

New cowling is over 1200!!!

Thanks for your help.

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