advice on a reliable used 25 outboard

ctbs

Cadet
Joined
May 16, 2004
Messages
15
Hello all,<br />I'm in the market for a 25hp electric start tiller outboard. I'm looking to spend about $800.00. I have several questions that only the experienced will know;<br />1. I'm not sure what year this price point will bring me, but could you comment on the virtues of the mid 70s through mid 90 s? Is one block more reliable than the other etc.? I plan on buying and holding this engine for many years.<br />2. I understand that around 1982 they started measuring HP at the prop. What % difference is there between a say the trust of 1975 and 1985 25HP outboard?<br />3. In my limited experience, all electric starts were engaged via a key at a counsel. I have a 14' "row boat", and will be needing a tillered engine. Is there a kit which allows for the ES to be engaged from where I'll be sitting at the motor?<br />4. Although i'm thinking John. and Even. if you have time, do you have any Mercury advice for the same questions above?<br />I just want to be smart.<br />Kind regards,<br />Chris
 

ledgefinder

Ensign
Joined
May 2, 2002
Messages
916
Re: advice on a reliable used 25 outboard

IMHO, the 1970s are the equal of the 1990s. Some people in fact prefer 1964 through 1973 because they run straight coil-magneto ignition (no integrated circuit powerpacks to burn out). Outboards, particularly OMCs, are built a bit like airplane engines, and they don't really wear out if treated correctly (and run in fresh water). There are lots of OMC twins from the late 1950s running around. Pick the right motor, and maintain it right, & you can leave it in your will to a grandchild. <br /><br />The horsepower re-rate for MOST of the motors was in 1986, and was around 10-15%. I've seen electric starts on tiller motors (button on the tiller), but not sure about the OMC 25hp. You might try pull-starting though, before you dismiss it - it's pretty easy once you get the feel for it.<br /><br />The Merc 18/25s are OK. but I don't think they hold a candle to the OMC twins...particularly for saltwater use.
 

JB

Honorary Moderator Emeritus
Joined
Mar 25, 2001
Messages
45,907
Re: advice on a reliable used 25 outboard

Moving to General Outboard
 

Jack Shellac

Lieutenant Commander
Joined
Aug 7, 2002
Messages
1,661
Re: advice on a reliable used 25 outboard

I'll agree with Ledgefinders comments. For your price, an older 25 HP OMC is going to be hard to beat. Down here on the bay, a very popular rig over the years has been a 14' locally built wood boat and almost every one of them powered by a 25 HP OMC. Thre are literally hundreds of them and the OMC's hold up in salt water and seem to run forever. Older OMC's are hard to find for sale because of this. Mine is a 1972 Evinrude and it's still a strong motor. The older Merc's didn't have the reputation of holding up in salt water.
 

BF

Lieutenant
Joined
Apr 8, 2003
Messages
1,489
Re: advice on a reliable used 25 outboard

Hiya,<br /><br />I was in just your position earlier this spring, so I'll tell you my story... I wanted a 20-30 hp electric start tiller for not too much cash, and that had some life left in it. I ended up buying an older (1970) 25 hp Evinrude, short shaft, electric and rope start, tiller. It was in outwardly good shape, compression was real good (130 on both), I saw it run in a tank, checked lower unit, looked good with no water. Took it home for $350 (cdn), came with tank, hose and spare prop.<br /><br />Since I knew that it hadn't been used in a couple years, and was pretty sure it had it's maintenance neglected before that, I have done:<br /><br />new impeller (old one worked, but when opened found it was worn and the tip broken off one vane)<br />new points/condensers (was intending to do this for sure)<br />new coils (1 was original and cracked, I replaced both)<br />did carb rebuild<br />new "stop" button (old one had disintegrated)<br />new drive pin (old one had one side broken off)<br />new plugs<br />ran some seafoam through it<br /><br />runs good, but after running it a weekend I found:<br />a small lower unit leak (diagnosed with pressure test, didn't cost anything to fix)<br />the previous owner's repair of the starter mounting holes on the block sucked, so I have re-drilled & tapped the mounting holes and installed Keen inserts to give mounting holes proper threads... we'll see if my first repair attempt holds any better. Rope starting is actually no problem at all. (I think wifey could even do it)<br /><br />By the way, my motor has a rubber button switch on the side (same side as shifter) that activates the starter. It's the same kind of rubber covered switch as the "stop/kill" button.<br /><br />So, the upshot is that for the cost of the motor and about $200 cdn in parts (that's OMC dealer prices) I hopefully have a motor that can see quite a bit of use before it needs more wrenchin'. Time will tell. So, my advice to you is to consider that if you intend to use & trust whatever you're buying, expect to have to do some inspecting/parts replacing and factor that into your budget accordingly. Anything you buy (even newer) will need the water pump serviced unless you are sure it has been done lately... If buying older like I did, expect to go throught the ignition... coils can crack whether they're being used or not. As has been mentioned, the up side of older is that you can diagnose/replace/repair the ignition system yourself pretty easily (it took me a while to figure out how to set points accurately, but I guess I'm too young to have much experience with that :) )<br /><br />BTW, sometimes dealership/repair places have decent deals on used ones. Usually not cheap cheap, but usually they've serviced them before selling (water pump and tune up) and often they'll give you a warranty of some sort. Often when an older OB breaks, folks just trade them in on a new one, dealer fixes and sells.<br /><br />Anyway, I thought I'd tell you my story (so far). Good luck... <br /><br /><br />Brent
 

BF

Lieutenant
Joined
Apr 8, 2003
Messages
1,489
Re: advice on a reliable used 25 outboard

no problem... and I forgot to include - changing the LU lube in the list of things that I did before I ran it.<br /><br />Brent
 
Top