repowering 150 Yamaha OX 66
 

I'm looking at a 2001 Yamaha 150 OX 66. Presently there is a 1987 200 Merc Black Max on the boat. The mechanic is telling me the Merc is tired and firing on just 5 of the 6 cyl. Anybody out there got one of these Yamahas and are you happy with it.

Re: repowering 150 Yamaha OX 66
 

don't have one but those were the best motors Yamaha ever built. you can't go wrong. How many hours does it have? those are good for around 2500 hours with no problems.

Re: repowering 150 Yamaha OX 66
 

I just replaced my 1994 Yamaha 150 with a 2004 . It was a great motor . I only had minor problems with it over the years . I don't think that you will go wrong.

Re: repowering 150 Yamaha OX 66
 

Yo DI, sounds like a smart move. I got a 2004 like Labii and I'm in love :-) Ironically, it replaced a 1994 Yamaha 150hp too!

Re: repowering 150 Yamaha OX 66
 

Blue have you noticed how quiet the 04 is vs. 94 ?

Re: repowering 150 Yamaha OX 66
 

My mechanic tells me the hours are low and he'll warranty for 90 days. He wants $4500 for the motor and $650 for rigging an installation. Is that about right? Did you notice a signifcant saving in fuel from carbs to injected and lastly how about performance. Thanks in advance

Re: repowering 150 Yamaha OX 66
 

I have a 2005 F150 4 stroke yamaha and my dishwasher makes more noise than my outboard, and my dishwasher is quiet! It does great on gas, I only fill up once every 5 or 6 trips. I know that dosn't give a lot of info on fuel mileage, but I clock a bunch of miles every trip.

Re: repowering 150 Yamaha OX 66
 

No experience with the model, but NADA guides says motor is around $5300-6300. Sounds like a fair deal. Rigging price is pretty good, too. Usually that's $1000-1500 for parts and labor, around here anyway.

I have several friends that run the Ox66 series and having fished with them, they're great motors with very few problems.

Re: repowering 150 Yamaha OX 66
 

MY older friend here an old salt says the best motors made are the two stroke Yammies, most durable and reliable and that ox66 is supposed to be their best. I've had two mercs a force evinrude suzuki and now I got the the 99 115 johnson which seems like a sweet motor. If I was going to buy a motor new it would be a Yamaha 2 or 4 stroke, just too many people I know with them and not once have one of them done anything but praise them

Re: repowering 150 Yamaha OX 66
 

Plus the Grand Puhbah, who could have any motor he wants went with a Yammie, I was on that boat and that motor is sweet. So that settles it for me

Re: repowering 150 Yamaha OX 66
 

DI, sounds like a pretty sweet deal to me...as always when buyin' used motor (I did), look at compression test numbers and lower-unit oil... ;) :D...if those look good, then GO FOR IT!!... ;) ;D 8)...

Re: repowering 150 Yamaha OX 66
 

I talked to my yamaha dealer and he says the OX has something to do with the altitude adjustment. He's got a 2001 Yamaha 150 carb for $5,995 installed I would need a control box for another $300 since i run a 200 johnson, looks like you got a good deal. Good Luck with it. Ck. compression and lower unit. Watch them do it if they let you and learn. Knowledge is a great thing... but dumb and lucky works too. Guess i'll just run mr. johnson till it dont run no more.

Re: repowering 150 Yamaha OX 66
 

Gentleman thanks for your input and support.

Re: repowering 150 Yamaha OX 66
 

Well DI, the "input and support " we got pleanty of around here...It's the "Gentlemen" thing you'll find rare as an equitorial iceberg :)...

Re: repowering 150 Yamaha OX 66
 

Those Yamaha motors are great, but don't give your merc away (unless you want to send it to me!!).

Did the mechanic tell you which cylinder isn't firing?

Shouldn't take more than 30 minutes troubleshoot that problem and fix it (assuming you have the parts).

Start at the plug (that isn't firing) and trace the connection back.

Things it could be.
1. bad plug
2. plug wire
3. Coil
4. Bad switch box (1,3,5 or 2,4,6)
5. Corroded wire or lose connection b/w the switchboxes and the coil.

Assuming your compression is normal around 125 psi in all 6, I'd say fix the Merc (don't forget the yank the oil injection if you do).

Re: repowering 150 Yamaha OX 66
 

There was more bad news that I should have put in the post. There were several leaks that indicated the head had problems and judging by the corrosion it had been sometime since anyone had looked at it. The lower unit appeared to be dripping and the trim tabs would go up but not down. Had I known you were interested in the engine I certainly would have offered it. The Yamaha has been mounted and I should get the boat back tom. to get cleaned up and ready for the water in a few weeks.

Re: repowering 150 Yamaha OX 66
 

Well Dunc . . . you'll love the new motor!! It's a bit more fuel efficent than the Merc Blackmax 200 :)

Re: repowering 150 Yamaha OX 66
 

Sorry Llabi, yes its the first thing I noticed. I had to double check my serial number to make sure they didn't accidently give me a 4 stroke ;D