seized engine restoration evinrude 85 HP

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    Posted: 18 Dec 2014 at 5:37pm
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Hi guys,

I'm quite new with the whole engine restoration stuff, just thought I'd share it with people in the forum ( don't knw where else to go).. so ive got an evinrude 85 HP not sure about the year, i think its between late 70's to early 80's.. the outboard ran alright last season, but always had hiccups along the way.. had it fully service around March.. used it couple of times and been sitting since, thought about time to let it feels water again.. long story short, mechanic told me that it was seized and its either needs a new motor or rebuild the engine.. me and my mate kinda tight on budget so hoping to rebuilt along the way..

I'm not sure whether it needs to be fully rebuilt or as i surfed the net the problem might just be in the cylinders.. I had the cylinder's head open (time for a new head gasket) and could see on the upper left cylinder abit rusted inside.. so I assumed thats the reason the flywheel couldn't moved.. im no expert on outboard engine and need some of your thoughts, what to look.. where to look.. the how to-do steps.. or maybe just drop the whole project if you think the engine is unsaveable.. im based on Northshore Auckland if u'r an engine savvy and wanna hv a look at it you are more than welcome otherwise i'll try to upload photo every single step of the way for your thoughts.. highly appreciate it for all your help!!

AP
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Post Options Post Options   Likes (0) Likes(0)   Quote Ohsoslow Quote  Post ReplyReply Direct Link To This Post Posted: 18 Dec 2014 at 7:22pm
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Keep on ripping it apart! Then you'll have a better idea on condition of the bores, pistons, crank etc.. Won't cost you anything! Judging from that second pic it looks pretty F###ed though!
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Post Options Post Options   Likes (0) Likes(0)   Quote Don18025 Quote  Post ReplyReply Direct Link To This Post Posted: 18 Dec 2014 at 7:32pm
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Can you turn it over now you have thehead off?
Have you soaked a penetrant oil/lubicant on and around the rusty piston and then attempted to turn it over?
You have it appears had water in the right hand piston but not the left one. Is the cylinder liner cracked? To find out you will need to dismantle the powerhead and extract the piston.
It looks as if you are doing this work on the boat in the yard. Suggest you disconnect the power head from the leg and take it into the workshop/garage, and do this dismantling on a table.
Pulling your first motor to bits is an excellent learning experience, but you will learn alot more reassembing it.

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Post Options Post Options   Likes (0) Likes(0)   Quote mattyroo Quote  Post ReplyReply Direct Link To This Post Posted: 18 Dec 2014 at 7:57pm
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Best investment you can make is a Clymer manual for the engine.

Find the engine serial number and do a look-up on the net, which will tell you the year, then buy the appropriate manual.
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Post Options Post Options   Likes (0) Likes(0)   Quote pjc Quote  Post ReplyReply Direct Link To This Post Posted: 18 Dec 2014 at 7:57pm
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keep in mind cost of rebuild verses a secondhand motor
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Post Options Post Options   Likes (0) Likes(0)   Quote Betty Boop Quote  Post ReplyReply Direct Link To This Post Posted: 18 Dec 2014 at 8:11pm
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I've just done a similar vintage 90hp. I found a 115hp powerhead for $400.Total rehash came to about $1100 including rebuilding the base of the block exhausts. I will soon alter the carburator internals to create a 140hp. I had not done it b4 either and had some great advisers at West Auckland Marine.Wink
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Post Options Post Options   Likes (0) Likes(0)   Quote MacSkipper Quote  Post ReplyReply Direct Link To This Post Posted: 18 Dec 2014 at 8:33pm
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Yes I rebuilt my old Johnson 40 (was not seized though!) took power head off and into west akld marine - Glen fitted some used pistons and new rings and it ran sweet.
From pictures power head looks badly damaged by water - you would be better to get hold of another one that has stuffed gearbox and make a good one out of the two motors...
Good fishing trip nothing breaks, great trip catch fish.
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Post Options Post Options   Likes (0) Likes(0)   Quote Betty Boop Quote  Post ReplyReply Direct Link To This Post Posted: 18 Dec 2014 at 9:05pm
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The existing engine had a reco bottom end. Glens a m8 and did the tech pre assemble set up for me then sorted the run and tune up. Top bunch of blokes down there.......and the coffees good Thumbs Up
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Post Options Post Options   Likes (0) Likes(0)   Quote aaputra Quote  Post ReplyReply Direct Link To This Post Posted: 18 Dec 2014 at 9:55pm
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Thanks guys for the reply.. yea in the mean time I just ordered in PB blaster, see whether it crack the problem.. you reckon if I able to turn the flywheel i'll just hv to change the gaskets and that's it? Gaskets seem abit old, water might came from there.. or else whats should i do? Say i decided to look for secondhand powerhead, where should i look? I couldn't find anything on the market atm.. yea probably will take the bottom off and investigate the powerhead on a bench..only the problem with that is that my steering system is also seized , Is the glen you guys mentioned a guy or the name of the place? You reckon he/they will be able to help me sort the problem ? Walu, seems you got the experience to help me on this..whats the cost estimation to all of those u mentioned above? Just wanna perpare myself financially on that..atm Might have to wait 5-10 days while im using the penetrant oil and try to yank it in the end.. if that doesnt work, more work for me thn..
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Post Options Post Options   Likes (0) Likes(0)   Quote Brad76 Quote  Post ReplyReply Direct Link To This Post Posted: 18 Dec 2014 at 10:04pm
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Try Colin at Huntly marine. Hard to get hold of at times but worth ringing till you get him as he has a lot of older second hand parts or can do a rebuilt power head at good price.

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Post Options Post Options   Likes (0) Likes(0)   Quote Durban Quote  Post ReplyReply Direct Link To This Post Posted: 19 Dec 2014 at 12:23am
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The block could be 1972 for the simple reason in 1973 the water passage cover was changed to a different design [ a bit difficult to see on the 2nd photo i could be wrong more photos i will pinpoint it ]   the exhaust cover was changed to bubble back in 1978 you have the flat cover , the electrical   the connector plugs came out 1978 .Over all good motors if the job is done proper it should give you years of good service.good luck
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Post Options Post Options   Likes (0) Likes(0)   Quote aaputra Quote  Post ReplyReply Direct Link To This Post Posted: 19 Dec 2014 at 5:43pm
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Hey durban,
R u trying to say that the water problem can be due to its design? I can take photos frm different angle if u wish.. what angle you want me to take? Im still waiting for the penetrant oil to do its job, thn i'd be able to tell whether it needs further work or not.. ill update u guys about the progress (that if i made 1 ).. hopefully people can learn frm my process in the future..
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Post Options Post Options   Likes (0) Likes(0)   Quote Durban Quote  Post ReplyReply Direct Link To This Post Posted: 19 Dec 2014 at 9:03pm
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No there's nothing wrong with the water design , i would change the manifold gasket this is more then likely where the water would enter the block over a period of time your needle roller bearings will show signs of pitted from the salt .you need to inspect them .what i was trying to work out what year it is i looked at the water passage cover which is just below the flywheel this gave me an indication that the block is before 1978 and the exhaust cover witch is flat after 1978 they came out with a bubble design .now the confusion comes in with the connectors they came out after 1978 , its possible that the electrical has been changed some where along the line i don't know never the less i still regard the 85hp,s as good motors i have one myself a 1974 if looked after it will run for another 50 years . good way to tell what year it is if you don't have the model no is by the trigger & carb cam.     
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Post Options Post Options   Likes (0) Likes(0)   Quote empty Quote  Post ReplyReply Direct Link To This Post Posted: 19 Dec 2014 at 10:29pm
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iboats.com is a great site for info
what happened to the pissing man?
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Post Options Post Options   Likes (0) Likes(0)   Quote aaputra Quote  Post ReplyReply Direct Link To This Post Posted: 20 Dec 2014 at 4:35pm
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True that empty, i actually been doin my research frm there too.. but just thought i need local opinion and sources faster and easier. and i havent seen topic like this in the forum for awhile.. just thought i'd start one :D
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