Yamaha 90hp 2-Stroke

[jay_merrill]

I have always been an OMC guy but am intrigued with the 3 cylinder, Yamaha 90hp 2-Stroke. Any comments that anyone would care to offer in regard to reliability, fuel consumption, etc. will be appreciated. Also, I understand that this motor has oil injection ... has anyone disabled it to operate on premix?

 

[grid]

Re: Yamaha 90hp 2-Stroke

The early ones disintegrated like the old crossflows. The more recent ones (05-) have been great. Miserly on fuel, one even less than the 70 Evinrude it replaced on a 17' Aquasport. Don't disconnect the O/I. It's reliable, plus needs the oil to lube the gears.

 

[Major Woods]

Re: Yamaha 90hp 2-Stroke

I have a 2005 Yamaha 90hp motor on my 20' duck boat.
Quick & easy to start even in single digit temps. OK on gas, not great since it is a carbed motor.

Two thumbs up

 

[zzzzz]

Re: Yamaha 90hp 2-Stroke

Yamaha has the best oil injection system out there...do yourself a favor and leave it hooked up

 

[noelm]

Re: Yamaha 90hp 2-Stroke

what can you say? a very simple, reliable, fuel efficient motor, leave as is and enjoy!

 

[jay_merrill]

Re: Yamaha 90hp 2-Stroke

Thanks for the responses. If I buy one I'll leave the "oiler" alone. I really like the idea of an inline 3 cylinder as a 90 hp. My Johnson 65 is a great motor but those few extra horses would be nice and I wouldn't have to move the kicker off of the transom, as I would with a V-4. Only problem is that I would have to go find a kicker that doesn't use premix fuel! If only Briggs & Straton would make their air cooled 4-strokes salt water compatible!

 

[aleutianwest]

Re: Yamaha 90hp 2-Stroke

Hi when you say keep oil system hooked up because of the gears what gears are those. just wondering we pulled the oilpump shaft out and used a block off. motor has about 500 hrs on it now just wondering if i missed something thanks

 

[bubbalorrie]

Re: Yamaha 90hp 2-Stroke

we have a 1990 90 hp yamaha we want to remove the vro how do we do this? we like pre-mix fuel

 

[New2me]

Re: Yamaha 90hp 2-Stroke

THe blocker plate is all you need to do.My old 115merc I looped the oil hose just to circulate around the pump and It ran for years like that.The lower unit blew but he motor didnt.

 

[bubbalorrie]

Re: Yamaha 90hp 2-Stroke please help us

Re: Yamaha 90hp 2-Stroke please help us

Does anyone know how much oil to put in vro plastic jug on side of motor?We had oil running out cap with wires,and just kept running.

 

[rcmickey]

Re: Yamaha 90hp 2-Stroke

I have an 89 and I love it. I kept the vro in place but know several guys that removed it and had no issues. As far as gears go I do not know of any gears that use the 2stroke oil for lubercation. The only issue I have had is that my warning buzzer went off at about 4800 RPM yesterday. I shut it down and let it sit for a bit and ran it home without an issue. I ran it below 3000 on the way home and it seem to be ok. I'm still not sure what caused the buzzer but have not had any time to run any tests.