1. Use the full 4 digit year for everything you are asking your question about. Example: 1962, 1988, 2000, 2011
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What year is my Yamaha 90 hp???
seanwilmnc	#1  Posted on 07/15/12 - 9:30 AM
Member Personal Page Posts: 74 Comments: 0 Joined: 06/30/12	Can anyone tell me what year motor I have? My boat is a 1985 Montauk 17' The only thing I know is that its a 2 stroke 90 hp Yamaha. Any info would be greatly appreciated. Sean http://www.flickr.com/photos/45988259...88259@N07/ Edited by Joe Kriz on 07/15/12 - 10:06 AM
Tom W Clark	#2  Posted on 07/15/12 - 11:01 AM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	You need to find the serial number. Look for it stamped into a freeze plug.
seanwilmnc	#3  Posted on 07/15/12 - 11:38 AM
Member Personal Page Posts: 74 Comments: 0 Joined: 06/30/12	Is this my freeze plug? I think it says 428406 http://www.flickr.com/photos/45988259...576522032/
Tom W Clark	#4  Posted on 07/15/12 - 4:39 PM
Member Personal Page Posts: 4280 Comments: 7 Joined: 09/30/05	Yes, that's the serial number. We need the model prefix too but the decal on the motor brackets where that was is long gone. Still there may be a list somewhere with the serial portion of the number. I'll see if I can find it.
seanwilmnc	#5  Posted on 07/29/12 - 10:26 AM
Member Personal Page Posts: 74 Comments: 0 Joined: 06/30/12	I am still struggling to find out the year of my Yamaha 90 hp 2 stroke. If anyone can help I would greatly appreciate it. The only numbers I have are off the freeze plug #428406 Thanks http://www.flickr.com/photos/45988259...576522032/