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  what is the reputation of 79'-83' Merc's ?

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Author Topic:   what is the reputation of 79'-83' Merc's ?
bang4dabuck posted 02-13-2004 05:38 AM ET (US)   Profile for bang4dabuck   Send Email to bang4dabuck  
I got a 70 HP from that timeframe that needs some work. It is going on my Katama. Just trying to get a sense of how much to put into it ? If I had to replace it I would probably stick to something from the 1980's maybe 90 HP and look for fresh water use. That would fit my budget. Any opinions on this era of Merc ? From that timeframe was there any brand heads and tails above the others or are they all about equal ? Yamaha might not fit my budget, even an old one.


Clark Roberts posted 02-13-2004 10:34 AM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
Bang, as owner of over 100 outboards of most all makes/hp and lots of Mercs, my least favorite Mercs are the two cyl 35-40hp (Merc350-402 etc) and the first 3 cyl 50/60/70hp models. The 70hp, early 80's was overrated in power as I recall. Personally I wouldn't put a penny in any outboard of late 70's early 80's. My guess is that since your engine "needs repair" that repair costs will eclipse the cost of a good used late model engine, the bills will never stop coming in and your boating time/pleasure will be compromised! Just my 2 cents! Happy Whalin'.. Clark.. Spruce Creek Navy
PS> things to look for are corroded or inoperative trim/tilt, corroded tilt tube, water leaks around spark plug openings in water jacket, scoured cyl walls, low/no compression, etc (this is a blind bore engine and must be disassembled for any rebuilding) and component problems like starter motor, stator.etc..etc...frozen prop/drive shaft... remember that engine is approx 25 yrs old. If engine was mint condition then that's another story...
bang4dabuck posted 02-15-2004 12:42 PM ET (US)     Profile for bang4dabuck  Send Email to bang4dabuck     
The innards are supposedly redone. Tilt and trim could be a problem. I got 2 lower units supposedly both in working order. The rebuild job is incomplete (as to why the guy sold it to me)so we just need to figure out what wasn't done (the mechanic). He will do this for $45 and then let us know what she needs and how much. He said if we want him to tear the whole thing apart and rebuild it would be $400-500 and parts I think. So what brands you like as alternative from mid 80's to early 90's 70-90 HP ? Yamaha, Suzuki, Evinrude, Johnson ? Won't i have to re-rig my boat as to throttle, stearing and tirim and tilt ?


brisboats posted 02-15-2004 05:48 PM ET (US)     Profile for brisboats  Send Email to brisboats     

I am near you, I am in Egdewater/Beverly beach. If you are looking for a decent priced 70hp. I have a couple of 1970's running 70hp OMC looper engines I am going to sell, cheap. Email me if you are interested.

Thanks Brian

Bigshot posted 02-17-2004 03:46 PM ET (US)     Profile for Bigshot  Send Email to Bigshot     
I had a 1983 70hp Merc on my 15' Whaler. She would spin a 17" prop at about 5500(5700 redline) and about 36+mmph. I replaced it with a 1990 70hp Johnson that would turn a 20" prop at 5900 and do 46-48mph(48.6 was best). I have said this before, that 70 is more like 50hp and will be a dog on your boat. The wiring on those like to crumble when touched as well. Spend a little more mucho later.

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