Yamaha Boating - Page 6 - Recent Questions, Troubleshooting & Support
Does yamaha make 2 stroke 90 hp outboard motors during in 2016-17-18
yamaha like all engine manufacturers are controlled by the EPA in the countries they are sold
In most countries the use by date has been established and 2018 is the end date that they can be sold with the start date being as early as 2015
So to comply with EPA requirements, yamaha would be allowed to sell off existing stock but the retail section ( local dealers ) would be restricted form selling them in certain countries
So to answer your question
No yamaha would not be making 2 strokes after 2015 as they could not sell them so any you see would be existing stock in dealers being sold off
on Mar 25, 2018
What does 6.8 compression ratio m3an in kpa or psi on a 30d yamaha outboard motor
It means your engine's cylinder volume from the piston being at bottom dead center to top dead center divided by it's compression volume (the volume in just the cylinder head with the piston at TDC) equals 6.8,
which is a very low compression ratio.
It is not a measure of PSI. It's the ratio of how much the gas/air mixture is compressed before ignition.
The engine is taking 6.8 units and compressing it into 1 unit before ignition - a ratio of 6.8 to 1.
on Jan 23, 2018
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