Originally Posted By: sr17
I have just acquired this outboard, and need some oil advice.
it is a 2006, fuel injected Yamaha 90 hp 4 stroke with 213 hours.
I have no idea what Yamaha recommends for this model.
What viscosity should I use?
Synthetic or Dino?
Regular automotice, HDEO or Marine specific oil?
Does anyone know if the oil filter for this outboard cross references with anything that can be purchased from auto parts stores, or am I stuck with the Yamaha dealer for that?
I know you already bought Yamalube and a Yamaha filter as I saw a post from you later in the thread. However, I will answer your original post.
1 - I personally would only use an FC-W rated marine 4-stroke specific oil. I would not use regular automotive oil or even diesel oil. While they certainly can be used marine oil has special additives to help with corrosion and fuel dillution those other oils do not. If you will use the engine in saltwater you definitely want to use a marine specific oil with the FC-W rating. IMHOA.
Use the conventional or synthetic of your choice but again, IMO, use an FC-W rated marine specific oil. Amsoil offers a full synthetic FC-W rated marine 4-stroke oil for a reasonable cost( $9.75 p/qt USD ). Most conventional marine oils like Pennzoil or the dealer stuff will run you at least $8-$9. Almost doesn't make sense not to buy the Amsoil unless shipping fees and/or time constraints make it impractical.
2 - Your engine can run 10W-30 or 10W-40. The manual spec's both. Here is a PDF for the 2006+ F90( might be the link the other guy gave earlier - if so sorry for the double post )...
http://www.yamaha-motor.com/assets/service/manuals/1/LIT-18626-07-12_1406.pdf
3 - Your engine takes the same filter my 40HP 4-stroke Merc does from what I can tell. To get you the most accurate list of aftermarket filters if you could post the Yamaha # off the filter you got I can make sure my list is 100% accurate. From what I can tell you have the same filter as I do though and these are the cross reference and application listings from these mfg's.
The filter is a M20 X 1.5. These filters have some slight variances in dimensions but they should all fit as the #'s cross. Also, FWIW you can ask for the filter to fit a 2010 Nissan Altima with the 2.5L L4 and you will( should )get most of these filter #'s.
Royal Purple: 10-2876
K&N: KN-204( Fram PH6017A cross )
K&N: HP-1008( Nissan Altima )
Mobil 1: M1-108
Purolator Classic: L14612
Purolator PureOne: PL14612
Bosch: 3300
Bosch Distance Plus: D3300
Hastings: LF113
Baldwin: B1400
Wix: 51358
Napa ProSelect: 21358
Napa Gold: 1358
Fram: PH6017A( Yamaha OB specific )
Fram: PH6607( Nissan Altima )
STP: S6607
Hope this helps.