1989 Yamaha ?

[macojoe]

I just found a 1989 175hp Yamaha for sale and was wondering if anyone has any info on this engin good or bad? I have never owned a Yamaha so is there any special things to check out on them? <br />Do you think it is out of line to ask for the guy to do a conpression test while I am there? This guy says that he repairs them and then resell's them. What should a good compression read?<br />Thanks guy's I will be going to look at this motor tomorrow.

 

[vinney]

Re: 1989 Yamaha ?

The compression should 120 to 125 ibs. I service alot of v-6 yamaha. Great engine you need to decarb it twice a year or run ring free. The average hrs, I see is 1200 if you run ring free or decarb. I see them go 1600 hrs. We build 2 to 4 v-6s a week most of the year. On our rebuild it will go 1000 to 1200 hrs. decarb/ring free. The most common service is carbs and fuel pump diaphrams. Impellers and thermos every other year. Fuel stablizer if the boat sit more than four weeks. Check compression every year and write it down and compare from year to year. 20% difference highest to lowest time for a rebuild.

 

[macojoe]

Re: 1989 Yamaha ?

Thanks for the info! I will ask the guy to do a test when I am there. So if it is about 100 you say time to rebuild ? <br />Thanks

 

[ob]

Re: 1989 Yamaha ?

Not necessarily.Maybe just time for decarb.Just insure numbers are within around ten percent on all cylinders.

 

[vinney]

Re: 1989 Yamaha ?

Thats a roger. You can do a leak down test but it is dangerous. You bring each cylinder to top dead center and put 100 psi in each cylinder and watch how much air goes by the rings. The danger is holding the crankshaft at top dead center of each cylinder. We made a holding device. The leak down test is probably a better test but its much harder that a compression test. V

 

[macojoe]

Re: 1989 Yamaha ?

So is there a way to tell if it needs to be decarboned with a visualy look or just get it done and how expensive is this to do? Hope to see this motor tomorrow night. The guy is asking $2000 with controls. Is this a ggod price ? what should it be for a good motor? thanks again

 

[ob]

Re: 1989 Yamaha ?

The results of compression test will determine whether a decarb is needed.No visual.Local dealers carry decarb products and can steer you toward one they recommend.The product is dosed into cylinders and left to work for period of time .Engine is then run and evacuates residual hopefully removing carbon from ring grooves and cylinder walls if present and increasing compression.Instructions are on the product.Motor is worth 2 grand pending condition.Only a watercheck will prove it's ultimate worth. However ,if checked out by a reputable outboard service center it will take considerable wonder and guesswork out of the equasion.Good luck.<br />PS, You can obtain a fair market value for motor by asking local dealer to check NADA book for your specific motor.It is only a guideline price but may assist in your final decission or negotiating efforts.

 

[macojoe]

Re: 1989 Yamaha ?

Thanks! The boat is on a stand and I will only be able to start it and hear it run. So I will have to relie on a compression test. Well I am ready to go look and will let you no If I get it.I am 2nd on the list to look at it. Someone else wants to look at it and the guy said that they could. I said I have cash and they have promise. Cash in hand beats that hands down. But he wanted to give them a chance so we will see. <br />I at least no what to look for and I am sure this goes for all outboard's. <br />Thanks again

 

[macojoe]

Re: 1989 Yamaha ?

Thanks ob for the NADA info. you can go there online at http://www.nadaguides.com/SectionHome/Marine.asp?UserID=064567A0A00&DID=37570&wSec=4&wPg=1172 <br />and they tell you the weight and all about the motor the low price for this motor is $1315.00 average is $1565.00 did not say if this was with controls or not but got something to go by thanks

 

[John from Madison CT]

Re: 1989 Yamaha ?

One MAJOR MAJOR thing you have to check on this motor is the Shift Shaft. <br /><br />Late 80's/early 90's Yamaha's used steel shift shafts, not Stainless Steel like they do today. A very common problem is the rusting of this and breaking, which requires a very expensive repair, sometimes not even doable, since the powerhead needs to come off and after 12+ years she may be seized.<br /><br />Personally, I would be sure this have been upgraded otherwise you are asking for trouble. If the motor was only a FW motor you may be OK.<br /><br />John from Madison, CT

 

[Capt Ken]

Re: 1989 Yamaha ?

I haven't seen one yet that wasn't doable. Units starting with the 93 model have the SS shafts. If you take the engine to someone that works on Yamaha, its usually around a $300-$400 fix. Not a major undertaking unless you have a fear of corroded and frozen bolts.

 

[macojoe]

Re: 1989 Yamaha ?

Thanks guy's I just came home from the motor, and I bought it. I had the guy do a compression test and all the cyl were from 122 to 125 and the shift rod is orinagle, and in good shape. The motor has 297 hours on it. Looks good I had it started in a tank and ran well pumped water at a good rate. Let run for about 10 min at idle and temp stayed at about 120 on both sides. Lower unit oil was nice and clean.the power tilt and trim went up and down ok. The guy included wireing harness for motor and trim, control box, oil tank ,and muliti use all in one tac, and a 19 pitch stainless prop for $1800.00 All i need to buy is shift and throttle cables. A little paint on the cover and lower unit and away we go.again thanks for the info.

 

[vinney]

Re: 1989 Yamaha ?

Fearless Line them up and I will take them down. Haven't seen a powerhead I couldn't pull. Nor heat not cut off wheel bring them on. Make sure the Ben franklins are flying.

 

[macojoe]

Re: 1989 Yamaha ?

Vinney<br />If I ever need to have the shift shaft changed I will be sure to ship it to you. I can tell you would injoy the challange.

 

[Capt Ken]

Re: 1989 Yamaha ?

Hey Vinney, these guys don't know what a good challenge is. I love it when the owners try to save a buck and attempt this job themselves. Then the boat shows up at the shop door the next day with broken off bolts and beat to heck. Just like handing me a blank check. Its gotten to the point where I stock the two lenghts of shafts, gaskets and powerhead mounting bolts. Can't just get those bolts anywhere. Those that haven't attempted this job, the six holes that the long mounting bolts go thru in the exhaust housing is tapered with the small end of the hole to the bottom. So when that bolt is corroded up so bad that you twist off the head of the bolt, pulling the shank of the bolt back thru the hole is impossible. Kinda like the old chinese finger puzzle.

 

[macojoe]

Re: 1989 Yamaha ?

Hey guys I was not ever intending to do this type of job, Nor do I have the ability to do so. I was only comenting to Vinny that if I ever had to have it done I would send it to him since it seams that he likes the challange so much.<br /><br />I appreciate that fact that Vinny told me about the shaft so I could inspect it before buying. And I did and the guy who was selling was surprised that I even new about it. This shaft looks good so far not wore all that much, and hope not to have to change it in the near future.<br /><br />I checked everything I was told about and a few other things before buying. And all looks ok. Ran fine in tank. Next step is to mount the gill bracket and then the motor. This will have to wait till spring for a water test.<br /><br />Just ordered a manual for it and will doall regular mantaines before I use it reguardless of what the guy told me. This way I no that it is in the best shape I could get it before I hit the water. Then cross my fingers and hope for the best.<br />Thanks guys

 

[John from Madison CT]

Re: 1989 Yamaha ?

Congrats ! Great motor. Now go enjoy it !<br /><br />John