Evinrude 115 stripdown

[bob johnson]

Re: Evinrude 115 stripdown

ha ha, I hope you dont think i question your experience!! ha ha....but you notice he is from Dubai...how much fresh water you think that motor has seen...my guess ZERO!!!!

you HAVE TO ASSUME stuff will break!!!! he is doing ti himself...he certainly isnt a 20 year pro mechanic...he will break stuff!! rings break for bad reason... if he gouged the bor...honing is out...we know he probably doesnt have to do all four holes...thats why i mention if he did all four...the cost.. and he is in DUBAI.....you think the few marine machinist there are cheap? realistically...NO WAY!!! they probably think everyone over there is rich! ha ha

you have to consider the listener when you give advice... they have to be able to digest it!!!! to the OP..best of luck...figure high and be pleasantly suprised when it is less!!


bob

 

[daselbee]

Re: Evinrude 115 stripdown

zeph: "Anyone who works for a dealer would probably have you believe it's a real bad issue. "

There you go...right there! Nailed it.

 

[Ben Clegg]

Re: Evinrude 115 stripdown

zeph: "Anyone who works for a dealer would probably have you believe it's a real bad issue. "

There you go...right there! Nailed it.

You know.................. EVERY dealer I went to told me the same thing..............its not worth it. That was the gauntlet (so to speak), I'n not stupid and I will give it a go, I have stripped down engines before just not a 2 stroke for some time, the fact is i'm enjoying it. I also now know there has been someone else in there before me!
All you guys have been really helpful so screw the dealers.
BTW I've got it down to the crank and NO broken bolts so far (fingers crossed). Haven't got the pistons out yet and I still got a question that's niggling me and that is how do I know what size pistons are in there now?

Can anyone tell me what the 12 pin bolt size is before I go out and buy a load of sockets that don't fit?



Cheers guys

 

[bob johnson]

Re: Evinrude 115 stripdown

I took apart my 1997 ocean runner( different style motor so it might not be the same) and i used a 5/16 12 point socket to take the rod bolts out.

if you get the book...which you should it shows you exactly where and how to measure the pistons... if you are going to have the hole bored , tyhen youll have to tell the machinst the size you want, unless he is a marine machinist...then hed probably have that info already.

to hone out you will need a bore mike..to make sure you dont go oversize.....you cant take out more than .001 i bet before you get out of spec.....but many times the scratches come out in less than that....if you got GOUGES, you will have to go the boring route..

I dont have the factory manuial for your motor , but I do have an off brand and it says your bore is 3.4995-3.5005" ( metric 88.89-88.91) AND THAT .004" IS OUT OF SPEC FOR OVERSIZE SERVICE LIMIT. so i guess you could hone and if it doesnt go over 3.504 you are OK...


good luck

bob

 

[fishfeatures]

Re: Evinrude 115 stripdown

BenClegg I had the same trouble myself , what you need is a 5/16 12 point socket it's about 7-8mm but mm won't work. It's an imperial socket and I tried numereous garages over here to see if they had one so they could remove them for me but NOPE!!!! It's becuase the motor was put together in the USofA. You may have more luck aquiring one where you are but I had to go to Ebay to get one.
Damn metric..........

 

[Ben Clegg]

Re: Evinrude 115 stripdown

if you get the book...which you should it shows you exactly where and how to measure the pistons...

bob

Bob your a star mate!
Can you recommend the best manual , I have one at the moment buts its a bit generic (to say the least) in fact its crap!
Ben

 

[Ben Clegg]

Re: Evinrude 115 stripdown

BenClegg I had the same trouble myself , what you need is a 5/16 12 point socket ..........

Fishfeatures

Your right.....Ive just been out shopping and cant find one anywhere here.....more shops tomorrow
I remember years ago you could only buy point sockets and they were a B1tch as they always rounded the nuts off ha ha ......I wonder where they all went?
Ben

 

[metriccrescentwrench]

Re: Evinrude 115 stripdown

Bob your a star mate!
Can you recommend the best manual , I have one at the moment buts its a bit generic (to say the least) in fact its crap!
Ben

Best bet is to get the original OMC factory service manual. They're often available on ebay, and if not there's a company that sells reprints (someone on here will know the name).

 

[bob johnson]

Re: Evinrude 115 stripdown

I bought about 6 or 7 on Ebay so far....

some sellers have tons of them, you just got to look around...you want genuine OMC Johnson Evinrude service manual for the year and model you have...yours will probably be 90 and 115 90 degree CV motors.

check this guy out:

http://www.ebay.com/sch/i.html?_nkw...dkw=&_osacat=6028&_trksid=p3286.c0.m270.l1313

actually this is real close to what you want...it might even do the job if you cant find one for 1998

http://www.ebay.com/itm/OMC-JOHNSON...anuals_Literature&vxp=mtr&hash=item2309c344ab
bob

 

[1946Zephyr]

Re: Evinrude 115 stripdown

What do the machinists charge to punch a cylinder out .030 over, out that way? I found pistons withe rings and wrist pins for around $125 and less each. Wiseco, Sierra and BRP, so it shouldn't be too horrible costly to get this motor back to life. If you place your bearings carefully and keep care of them, there's a good chance you can put them back to service, rather than buying new. Chances are, the main and rod bearings are barely even worn in. I don't see a need to rebuild the carb. The OP said it ran pretty good before tear down.
Sorry Bob, didn't mean to upset you. I think we can help this gentleman through this and he'll have fun with and who knows....he can start his own business over there

 

[daselbee]

Re: Evinrude 115 stripdown

Damn metric...yes standard size is 5/16 inch/ 12 point socket. Get a 3/8 inch drive socket for strength in torqueing the them back. Use new rod bolts!!!

 

[Ben Clegg]

Re: Evinrude 115 stripdown



Well #1 piston is out , top ring totalled..............#2 piston Partial on the top ring (about 1/4 of ring missing)
#3 + #4 look fine.
I personally don't think its lack of lubricant more lack of cooling ? any ideas anyone?

I'm off to get the bores checked tomorrow ( I don't have the tools to check them) fingers crossed on that one.
Ben

 

[bob johnson]

Re: Evinrude 115 stripdown

id be REAL suprised......no...REAL REAL REAL suprised if you dont have to BORE that thing!!!

overheat is one of the most common issues with blown motors......and thermostats can cause overheating....as well as other things... bad carbs can cause over heating...clogged fuel passages leads to lean fuel mixtures...which lead to really hot combustion temperatures.......which leads to all kinds of expansion.....which leads to interested threads on Iboats.com!!


bob

 

[1946Zephyr]

Re: Evinrude 115 stripdown

One thing unique about mangled parts: no two will ever look the same. Yea it's safe to say a bore job is needed. Are the heads discolored from overheating? There's a good tell tale sign of overheat.

 

[Ben Clegg]

Re: Evinrude 115 stripdown

The inside top of the pistons have heat discolouration but that's it apart from what you can see. Ill post a few more pic's later.
I changed the impeller and thermostats about a week before I had the compression test done (should have done the compression first lesson learnt there then!).
One thing I did notice when replacing the thermostats is that one of the expansion valves (with the spring next to the thermostat) had pushed all the way through its seating hence no back pressure in the system AND the system obviously drained every time the the motor stopped. I'm hoping I cured the initial problem, unfortunately it was after the fact. Whats your views ? is there anything else I should be checking as I put it back together?

The engine obviously wasn't looked after by the previous owner!

Hey ...................but I'm having fun so far The Mrs isnt too happy that I have a stripped down engine in one of our bedrooms though Ooops

You guys have been really great and I know I wouldn't have gotten this far without your help and advice, cheers
Ben

 

[Ben Clegg]

Re: Evinrude 115 stripdown

I need to clean the block ettc before I get it back together, Does anyone have any tips on how to? I was thinking of de-greasing agent ...................let it dry.......blow everything clear with compressed air and then soak in 50/1 mix?

 

[1946Zephyr]

Re: Evinrude 115 stripdown

I use brake cleaner or carburetor cleaner to get the grease and oil off. This stuff usually doesn't leave any residue.

 

[Ben Clegg]

Re: Evinrude 115 stripdown

OK. The block is in for boring , 0.030 and that's only because I couldn't get hold of 0.020 pistons.

I have some other questions for you experts ................

If I'm re-boring to 0.30 do I need to change the head ? I'm guessing no but would like some expert advice please

The bolts around the exhaust are rusted and I recon will snap if I'm not careful, any advice on how best to remove them? I was thinking blow torch to heat them up first?


Ben

 

[Ben Clegg]

Re: Evinrude 115 stripdown

I use brake cleaner or carburetor cleaner to get the grease and oil off. This stuff usually doesn't leave any residue.

Perfect .does the job no worries , Cheers Captain Zephyr

 

[1946Zephyr]

Re: Evinrude 115 stripdown

Yea, I usually buy about 10 can of that stuff to degrease my old motors. It actually works pretty good.

Not to be nosey or anything, but what was the price on the pistons and boring?