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Yamaha f 90


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Stepdad had an F80 on his Ribeye rib. Can't remember what model year it was - would have been circa 2010-2012. Was fine when he had it. When I drove it it seemed smooth enough. What model year are you thinking of getting?

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On 4/8/2022 at 11:24 AM, JDP said:

Anyone got one or had any experience on boats with them ? considering replacing the honda 90.

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TBH, I have not heard a bad word against Yam engines for a few years now, so I guess they must be fine. A lot of commercials use them around here.

Edited by GPSguru
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14 minutes ago, GPSguru said:

TBH, I have not heard a bad word against Yam engines for a few years now, so I guess they must be fine. A lot of commercials use them around here.

Are any of the units from the main manufacturers known to be problematic- modern ones I mean? 
They’ve had a while to get them right now so surely it’s just the odd poorly maintained one that’s bad? 

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24 minutes ago, JonC said:

Are any of the units from the main manufacturers known to be problematic- modern ones I mean? 
They’ve had a while to get them right now so surely it’s just the odd poorly maintained one that’s bad? 

I guess you are right, all the main brands are reliable engines these days.

I think the move into 4 stroke technology and improvements in manufacturing (mimicking the automotive industry) was a game changer in outboard reliability.

 

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They've up the displacement and dropped the weight, improved economy increased midrange torque with the Yamaha.

The honda is ok but jumps in fuel use above 4250rpm and drops my range by 1/3. At 4500-5000rpm its great but this adds to much fuel for the remote trips where I need to take extra fuel drums. 

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Fuel use will be very boat dependant tho Jon, I guess you would need to compare hondas quoted figures to your real world figures, then apply same percentages to the yamaha quoted fuel useage figures and you may get a better idea of what to expect....

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17 minutes ago, suzook12 said:

Fuel use will be very boat dependant tho Jon, I guess you would need to compare hondas quoted figures to your real world figures, then apply same percentages to the yamaha quoted fuel useage figures and you may get a better idea of what to expect....

Yamaha and suzuki have full test bulletins with various boat and engine setups https://www.yamaha-motor.com.au/discover/outboard-tech/performance-data, unfortunately Honda don't. What I have found from various reports is how the vtec dramatically increases fuel after 4250rpm which is what Im finding. Ive had these same hulls before, first with a 90 merc 2 stroke then a yam f70 and now the Honda. The Honda up to 4250rpm wins hands down in terms of fuel range but above that its about the same as the old mercury.

A friend bought a new boat with the Yam f90 at Xmas but has only managed to get a short river trip so far this year with the crazy weather. Its only that secondhand values are high and new prices haven't really changed that much.

 

 

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