swapping a 70hp for a 90hp

[sprouticus]

Hy guys. My 1977 70hp evinrude need to be rebuilt, I don't want to pay for the shop to do it, and I don't think I have the time to do it myself before the season is over (I live in canada). There is an ad in the paper for a 1990 90hp evinrude for $2600 OBO (canadian) and I think I might buy it, put it on my boat, rebuild my old motor, and sell one of them next year. So hear are my questions..........will my tilt motor work on this new motor???? how hard will it be to change???? will my steering cable's work???? the new motor is oil injected, my old one isn't, can I still just mix the oil or will I burn out the oil mix pump????? I am barely getting 30mph right now.......what would your guess be on how fast I might go with a 90hp??? Will the 2 new props I bought for the 70 (13 1/4 pitch x 17 and 19) work on a 90??? Are there any problems I might have with the switch or is it something me and one of my bigger friends can do in a couple of hours????? Will my old control box work (not sure if the 90 has one)????? is $2600 a good price for this motor (it has a stainless prop)????? <br /><br />lol@all my ????<br /><br />thankyou for reading and in advance for your advice

 

[Dhadley]

Re: swapping a 70hp for a 90hp

The two motors are plug & play. Controls, wire harness and controls will all work.<br /><br />Why do you want to swap tilt motors?

 

[sprouticus]

Re: swapping a 70hp for a 90hp

not sure if the 90 has a a tilt motor......paper doesn't say...i am about to call them but wanted to ask you guys first. are the props swappable (new word??) is this a good price?? Do I have to worry about the new one being oil injected???? And what is your best guess on new top speed??? <br /><br />thanx for you help Dhadley

 

[Tacklewasher]

Re: swapping a 70hp for a 90hp

A guy locally (Kelowna) is selling a 140hp (1996 I think) for $3K Cdn. I think I'd offer $2K for a 1990 90HP in decent shape.<br /><br />Interested in answers to you questions as well.

 

[sprouticus]

Re: swapping a 70hp for a 90hp

heh tacklewasher.........nice to see you again. yeah, I was going to offer him 2000, there is no answer at that phone # right now . that 140 sounds like a good deal, but I think it might be too big for my boat.........you once offered to check out what the guy in winfield had to offer.........anything around the 2000 mark????<br /><br />heh...I was just reading your project.......when is the fraser opened for sockeye?????? I don't know how to find out. I landed a couple of coho's 2 years ago when I was down there........would like to do it agian this year.

 

[Tacklewasher]

Re: swapping a 70hp for a 90hp

The guy in Winfield doesn't seem to have much right now. And I'm a bit ticked with him for selling me a prop with a spun hub.<br /><br />The Westbank motorcycle guy had nothing in the 70 to 90 range that I remember, but that's where I got my 115.<br /><br />I see the 140 is not being advertised right now. But I don't think it's sold. The guy selling it runs a houseboat charter in town. I don't know the name but I can get it if you would like.<br /><br />If you want to talk fishing, or just find out, go to www.fishbc.com.<br /><br />My project is pretty much done. I'm trying props right now and planning on spending the day on Wood lake (or Kalamalka, depends on the wind). <br /><br />I've got the week of Sept 12th off to go after Pinks on the Harrison.<br /><br />This board needs a PM feature

 

[sprouticus]

Re: swapping a 70hp for a 90hp

I'm not sure but I think the 140 might be a bit big for my boat.it's only a 16 foot and I can't seem to find the coastgaurd plate that tells you what the recomended maximum HP is. (I would appreicate anyone elses input on this.its a campion if that helps.....around 1980 I would guess.) I think my budget is about 2k...<br /><br />I offered 2k for that 90hp.........he basically said he thinks he could get more because he had a lot of interest in it. I told him I would call again tuesday and see if its sold.<br /><br />The dealers here in Penticton had nothing either last week.....I will call again next week and see.<br /><br />And I plan on visiting fishbc.com real quick

 

[sprouticus]

Re: swapping a 70hp for a 90hp

update:<br /><br />I called the guy today.........he still had the motor but says he needs to get at least $2500 for it. It includes a tilt/trim, control box, and gas tanks. It also has a stainless steel prop, so, knowing all of that, is this motor a good deal???? Or, is there a site on the internet where I might get a decent motor for a decent price??? I'm not sure I trust e-bay on this. Thankyou to you fine folks at iboats for helping me.<br /><br />p.s. Is a 1990 90 evinrude a good motor???? I talked to a guy who tried to sell me a yamaha and basically he said that he woudln't touch any OMC motor made before Bombadier bought them out. He said that they will not be making parts for them anymore. I would like to have a second opinion.

 

[Dhadley]

Re: swapping a 70hp for a 90hp

Be honest -- what did you expect the Yamaha guy to say?

 

[sprouticus]

Re: swapping a 70hp for a 90hp

exactly why I wanted a second opinion...lol..........he actually wasn't a yamaha guy though, just a guy that worked at a local outboard shop. They also had a crysler that would fit my boat for $900, and he told me to stay away from it, he said crysler's were all junk. But he could have just been trying to sell me the more expensive motor ($3700 for a 1992 90hp yammaha that was just rebuilt)<br /><br />so Dhadley, what do you think I should do???<br /><br />-buy a 1990 90hp evinrude for $2500, be on the water in a few days, and rebuild mine over the winter, and if all goes well, sell one next year. This way I risk buying another motor that could crap out, plus not get mine fixed right, and be out a whole lot of money. But on the other hand I might get a newer, bigger motor, for not too much cash if I can fix and sell mine. If everything goes well this option is the highest risk, but best returns. <br /><br />-get the shop to rebuild my 1977 70hp evinrude for approx $1500-$2000, and be on the water in a couple of weeks. This way I will be garaunteed a working motor, but will miss most of whats left of the season, and will still have a 70hp that may be worht what I spend getting it fixed, but probably not. this option is the least risk but very small returns.<br /><br />-try to rebuild my motor myself (I now have a manual) for approx. $500-1000 in parts (depending on how much damage my motor has) and if all goes well I could catch the end of the season, be back on the water for the lowest amount of money, and learn something in the process. However I risk not being able to fix it, and wrecking my motor compleatly. Plus my season will be shot, and alot of my free time this summer that could be spent on the lake, will be spent fixing that motor. This option is high risk, lowest return, but for a minimal investment.<br /><br />-Or I could just wait and see if another motor becomes available locally.<br /><br />sorry for the long post. what would you guys do???

 

[sprouticus]

Re: swapping a 70hp for a 90hp

bump

 

[sycamore]

Re: swapping a 70hp for a 90hp

If the 90 is not on a boat, tell the guy you will buy on trial only. You will install on your boat, run it, and take it or give it back. I would hate to buy it and have problems with two motors. If you were not completely satisfied with your 70hp performance, then it sounds like you were looking for a change. Otherwise give a buddy $40 for gas money and have him take you for the next couple of weeks while you fix yours.

 

[vranasaurus]

Re: swapping a 70hp for a 90hp

$2500 Canadian is about 2000 American. If the motor is in good shape it doesn't sound to unreasonable. But make sure you thouroughly check it out first. <br /><br />If you are at all mechanically inclined you may not be out that much time on a rebuild. For me the most time consuming part was the machine shop and waiting for parts. Other than that I had my powerhead apart in one day and back together in one day. <br /><br />The 90 is a good motor. I have an 1989 90 that I just rebuilt and it runs like a champ. I don't htink you would be dissappointed in the 90. As long as it is in good working order. <br /><br />The guy that said you can't get parts for OMC prior to bombadier is full of crap. If you look on the internet you can find 20-30 or more places selling parts. I think he was just trying to sell you the more expensive motor. <br /><br />Hope this helps.

 

[sprouticus]

Re: swapping a 70hp for a 90hp

thanx for your advice guys. I think I will go and try to dissassemble my 70 now (if my 2 year old will behave), and call the guy tonight and run a few tests on his motor.

 

[ledgefinder]

Re: swapping a 70hp for a 90hp

BTW, expect twice the power (especially midrange), and twice the gas consumption, out of the 90.

 

[sprouticus]

Re: swapping a 70hp for a 90hp

update:<br /><br />I have my 70 dissasembled, and am about to bring the power head to the shop to see how much damage it has. I think then I will decide on wether to buy the 90 or not because if it cost's more to fix my 70 than its worth, then I think I will sell the leg etc. on ebay, and cut my losses.<br /><br />just out of curiosty, I can't find the coastgard plate on my boat, I think one of the previous owners must have removed it. I have a 16' campion fibreglass runabout. I think it's an 1981. Any guesses on what my maximum hp would be for this boat??? There are other motors available locally but I think they may be too big.

 

[ledgefinder]

Re: swapping a 70hp for a 90hp

Just re-reading the posts. The post-1985 90 and 88hp crossflow V4 is a great motor; one of the best. They are equivalent to the pre-1986 115hp V4s (horsepower rate in 1986), and IMHO have one of the nicest powerbands out there. I had an 88 on a 19' GradyWhite and never wanted more HP. They're mildly tuned enough that they don't burn out as readily as the bubblebacks. OMC made this motor since 1969, and by the mid-80s, basically, they really got it dialed in. Good reliable motor - only shortcoming is you will be shocked by how much fuel that 100 cubic inch V4 uses, compared to your 50 cubic inch 70hp. Compared to the 70 triple, the 90hp's midrange will feel like "may the force be with you".<br /><br />Yamahas are sweet motors. Yamaha sure knows how to make a 2stoke engine, and the 225+ V6s are awesome. However, until the 1990s Yamaha didn't have the corrosion control that OMCs have. New Yammies are nice, but I don't think they 'age' as well in other ways either - the bits & pieces just don't have that indestructable 50year life span that OMCs seem to have. Your Yamaha dealer may have been referring to a group of late-1990s OMC direct injection "Ficht" motors, some of which have reliability problems. Otherwise, he's blowing smoke - ask around.<br /><br />Coincidently, the wife & kids & are out the door, Boston to Banff tomorrow AM. We were headed for Vancouver, and up the BC coast, but my 3.5 week vacation got dialed down to 2 weeks (dammit, found a job), so the Rockies are as far as we are aiming for. Next time I get canned though, we're headed for maybe 100K north of Vancouver...

 

[sprouticus]

Re: swapping a 70hp for a 90hp

lol@get canned.......well ledgefinder, I live about 400 k's east of Vancouver in the okanogan valley. If your ever up this way I'll buy you a beer. I'm assuming by your posts that you recomend buying that 90hp, and thats where i'm leaning. The shop has my powerhead right now, and they will tell me on tuesday how much it will cost to get it fixed. I probably need a new crankshaft, and possibly a new head, so it might be more than the motor is worth. If that is the case I will be buying the 90 if its still available. Thanx for your advice, and I still welcome anyone's opinion on how much hp my boat can handle.<br /><br />p.s. have fun in banff.........its awesome out there, visit the glacier (might be in jasper, can't remember) and go white water rafting. Lake Louise is nice too.