90 HP Yamaha

rrusso421 · Posted: Tue Aug 24, 2010 10:16 am Post subject: 90 HP Yamaha

Looking for feed back on late model Yamaha 90 HP 4 stroke. I would like to know minimum idle speed, smoothness at idle and slow trolling speeds and noise level at cruising speeds?

Captains Cat · Posted: Tue Aug 24, 2010 10:24 am Post subject:

Not sure about the particulars on the Yami but most of the 4 Stroke EFIs idle at about 600rpm. Very quiet. Hard to tell it's running. With one engine going, I sometimes try to restart it (can't tell which one is running).

As for minimum trolling speed, would depend on the boat you've got it on, trim tabs, etc, etc. My twin 115 Suzis are pretty quiet, even at WOT. We usually close the cabin door because of the wind. We troll with one when I fish (rarely...). about 2knots.

Charlie

Sea Wolf · Posted: Tue Aug 24, 2010 11:45 am Post subject: Re: 90 HP Yamaha

rrusso421 · Posted: Tue Aug 24, 2010 12:12 pm Post subject:

I agree, the Honda 90 is probably stronger, I have seen results stating that it puts out about 96 HP. But I have heard that it shakes at idle, and it does not have the electronic trolling speed option like the Yamaha.

A Fishin C · Guest

Mine trolls as slow as I need. Can go less than 2 mph. It is not quiet at plane unless you close the door. Mine is an 07.

Matt Gurnsey · Posted: Tue Aug 24, 2010 1:40 pm Post subject:

I've run the Suzuki, Yamaha and Hondas, and the Honda is the leats smooth of the bunch. I was really surprised, becaue Honda prides themselves on how smooth their engines are.

This was on a used 22 Cruiser, and it was the fuel injected Honda. For my money, the Yamaha is superior.

rrusso421 · Posted: Tue Aug 24, 2010 3:07 pm Post subject:

Thanks, I've had similar experience with Suzuki and Honda myself. The smoothest motors I have ever owned were a 2003 Yamaha 25 HP 4 stroke and a 1983 Mecury 50HP 4 cylinder 2 stroke, which I still own and use on a 17' Seanymph.

BrentB · Posted: Tue Aug 24, 2010 5:07 pm Post subject:

If you dont have one, owner's manual are posted at
http://www.yamaha-motor.com/outboard/service/viewmanuals/outboard_manuals.aspx
Andy ar andyjr@shipyardisland.com is another contact
He has a Hull Truth vendor site, too

c-ness · Posted: Tue Aug 24, 2010 6:27 pm Post subject:

I don't know about the 90s but I currently have two boats. One runs a 40 Honda and the other a 50 Yamaha. I prefer the Yamaha. It idles much better and is quiter. Both are great motors, just a bit of an edge in my opinion to the Yamaha.

BrentB · Posted: Tue Aug 24, 2010 8:34 pm Post subject:

Wefings · Posted: Tue Aug 24, 2010 8:50 pm Post subject:

I just sold my 90EFI Honda on my 22 CC C Dory , I liked that motor alot ,but all the aforementioned motors are good [even the venerable carb 90 Honda which I have on a rental boat and has been a workhorse if you know how to add stabilizer and run it alot ] The Suzuki 90 wins hands down for power to weight ratio and most modern design ,That can make a difference on some boats ,not all , but its the pinnacle in that department right now .
Now if you ask me me about 4 stroke 70s right now, I might put the new Yamaha first
. 60 HP has a plethora of good choices.
Ill take one of each .
Marc

Tortuga · Posted: Tue Aug 24, 2010 11:24 pm Post subject:

I bought a 2008 Yamaha 90 EFI in November 08 and I've been delighted. It always starts immediately regardless of how long it has sat, runs flawlessly with great torque across the rpm range.

Idle speed about 500-600 if I recall -- and smooth idle. In flat water it'll run at 29 mph at 5000 all day long. That was my experience today coming across to Avalon (Catalina). On a typical choppy day it'll run smoothly at 4000 pushing about 18-20.

I can't compare to the other brands, but I am very happy with this engine.

Byrdman · Posted: Wed Aug 25, 2010 10:07 am Post subject:

So many motors......so few boats in the garage to try them on.

Aint life grand in the 4 stroke world!!

Byrdman

Sneaks · Posted: Wed Aug 25, 2010 10:49 am Post subject:

The Jenny B has a 75 Yamaha EFI which is a clone of the 90 detuned for slightly more bottom end torque. Loved it. 3800 rpm was the "sweet spot" for best mileage and WOT gave it 29-30 mph depending upon the gods that day.

I'm now shopping to re-power the Honky Dory and will definitely go Yamaha again. Leave the boat alone for a month - no problem. Fires up quickly and no "varnished carb" syndrome either. One unpublished feature of the 75/90: Hot showers. If you hook a hose with a shower head onto the engine flush connection (easily accessed from inside the boat) then start the engine you can use it as a hot water body rinse. Not as fun in salt water but great in a lake!
Laughing

Don