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Thread: Yamaha F70 gear ratio
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01-04-2020, 06:27 AM #15000 RPM
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Yamaha F70 gear ratio
Hello Yammie Gurus out there. I am wondering if the Yamaha F70 gear ratio (2.33:1) can be easily swap out to a lower ratio in the F50 (1.83:1)?
Are there any 15" mid section for these 4 stroke motors?
Thanks
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mattmak77 thanked for this post
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01-04-2020, 11:31 AM #2
It should fit the upper cases share the same part number, as do the crankshafts. As long as the driveshafts would be the same length it will fit. You need a full lower unit from the F50 though, not just a re-gear. These were from a 2016 F50 and F70.
Crankshaft p/n - 6C5-11411-10
Upper Case p/n - 6C5-45111-00-8D
You need a complete lower unit p/n - 69W-45300-01
This info is all assuming it is a new(er) unit. I used a 2016 for reference.
www.InjectorService.com
Call/Text - 204-326-0390
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Mini GT thanked for this post
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01-04-2020, 11:37 AM #35000 RPM
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