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Catalina/Capri 25/250 Sailor's Forums

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Old Evinrude engine maintenance

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redeye
Master Marine Consultant

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Initially Posted - 04/13/2012 : 13:03:23

.
.

I'm about to switch out to an older engine, 70s era 4hp I think that I have kinda worked over so I can bring home the 84 sailmaster ( evinrude 6hp ) that is currently on the boat, running good but needs some attention... and put it on the bench ( workhorse ) and try some maintenance on it..

I'll open this up for discussion on some older 2 strokes as to what they might need for some lovin....

I took the one above to a local marine mechanic and they charged me about $200 bucks and it runs great, looks like it got a new Fuel pump and plugs...

And I'll try to comment on what I'm doing to the Sailmaster to keep it running.

Ray in Atlanta, Ga.
"Lee Key" '84 Catalina 25
Standard Rig / Fin Keel

Edited by - redeye on 04/16/2012 05:02:57

CarbonSink62
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Response Posted - 04/13/2012 : 13:27:55

Thanks, Ray.

My new (to me) C-25 came with a 1981 Evinrude 9.9 SailMaster (E10RCID); I built a test stand and have managed to tickle it with a 12VDC battery and get the starter to turn it over; I haven't even connected gas to it yet. (The tank is on order).

I have some (a little) confidence that it will eventually run ok, but I'm about to put my son's 2002 5hp Merc short shaft on the stand and get it running because I think that will be the engine that gets the boat from the marina to the mooring (at slack tide).

I'm learning more about engines as I go, but it seems like it will take a few parts and some hours to get the Evinrude running and I splash 4 weeks from today.

I really wish I had $2,000-2,500 for a new 10hp 4stroke, but it just isn't going to happen this year. Hoping I can resurrect the Evinrude for a season or two.

Stand by. I will have questions.

Ken

Edited by - on

Prospector
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Canada
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Response Posted - 04/13/2012 : 13:36:35

Shortshaft would be a tough sell for me. We cavitate pretty good with a 9.9 Evinrude Yachtwin long shaft.

Edited by - on

CarbonSink62
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Response Posted - 04/13/2012 : 13:53:00

It would be a tough sell, but I already own it (well, my son does).

Slack tide; in the river; 2-3 mile transit; I think I'll be ok.

The wake from a large ship might make it ventilate, but I can deal with that.

I know that if I was on the ocean in choppy conditions I'd have a real problem.

Edited by - on

redeye
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Response Posted - 04/16/2012 : 05:15:48

Yepper... First thing I'd do find a good mechanic in the area and take the sailmaster to let them look at it.

My Sailmaster that I'm taking off the boat has already been looked at by a good mechanic about 3 years ago. Now's the time for some minor work that I can do.

The old engine ( Johnson 1975 ? 6 hp "Fisherman" sn 6502M-E06868) ran good this weekend, with some particular behaviors it has.. sounds very clunky, and the prop looks like it cavitates as it runs.. probably eating the prop as it runs..
That engine might have 60 hours left on it, but who knows..

Edited by - redeye on 04/17/2012 05:08:59

redeye
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Response Posted - 04/17/2012 : 05:15:24

Apparently I thought the foot was gonna come apart cause I put some bondo on it sometime in the past...

Gee... think that will cause prop cavitation?

Edited by - on

redeye
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Response Posted - 04/17/2012 : 06:10:21

Looks like the gearcase oil is leaking a little, I had just changed the oil before I put it up and none was on the floor where I laid the engine, so its pretty much holding the oil. You can see some coming out the lower screw on the right.

The two big flat head screws you can see left and right are the lower unit filling plugs. With the engine upright you remove both plugs and let the oil run out, and then add gear grease by putting the tube of grease nipple in the lower opening, squeeze the tube till you see it come out the top, and then plug both holes.

Edited by - redeye on 04/17/2012 06:12:59

CarbonSink62
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Response Posted - 04/17/2012 : 11:55:33

So the old oil runs out as a liquid, but the new oil is pumped in like a grease?

Is the lower unit oil dispensed with a grease gun or is it more like a toothpaste tube?

Possibly stupid question follows:

What if you remove both screws and the oil doesn't come out?

Edited by - on

redeye
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Response Posted - 04/17/2012 : 13:35:59

<< So the old oil runs out as a liquid, but the new oil is pumped in like a grease? >>

nope they are both like 90W. a liquid.

You buy the gear oil in a big toothpaste lookin tube.

I have seen some people (me) pump it in from the bottom with a grease gun, lithium grease. Marine Bearing Grease.

Again.. this is on an old engine. seals are "loose". Don't try anything I advise on a new engine cause I've never read the manual of a new engine. And ANother thing... we have warm weather down here.. quite different up in NH...

So up there I would stick with the recommended tube of gear oil. Bought mine at West Marine.

Edited by - redeye on 04/18/2012 07:16:40

CarbonSink62
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Response Posted - 04/17/2012 : 14:29:06

Thanks, Ray.

I got the 5hp Merc running; I think I'll change the lower unit oil just for the practice.

It's a newer engine and shows no sign of leaking oil but it wasn't done last year and it looks like fun.

Edited by - on

GaryB
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Response Posted - 04/17/2012 : 18:18:33

Most gear oil for the older motors was 90 weight.

Edited by - on

Stu Jackson C34
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Response Posted - 04/19/2012 : 15:01:05

Might be good for a dinghy engine, too.

http://www.marineengine.com/parts/parts.php#manuals

We have a 1990 Evinrude 9.9 hp and I found this website when looking around for information.

Edited by - on

C25OBrien
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Response Posted - 04/20/2012 : 07:32:49

Everything you want to know about this topic is here http://www.sschapterpsa.com/ramblings/Ramblings.html#OMRA
This guy is legit, I bought a 1974 Evinrude 15hp off craigslist for nothing and got it to run like a champ after reading this info.

Edited by - on

C25OBrien
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Response Posted - 04/20/2012 : 07:41:13

More specifically, this article of his may be of use http://www.sschapterpsa.com/ramblings/OMC_6hp.htm

There is significantly more info for the 9.9/15hp motors but this should be a good read regardless.

Edited by - on

redeye
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Response Posted - 05/01/2012 : 04:44:50

Chris OB....

Thank You, that is a really great link, look forward to reading it. I spent last night reading ( for the third time ) the manual on changing out the water pump ( 1984 Evinrude/Johnson Sailmaster 6 hp ) and it looks pretty straight forward. ( beware pulling up the drive shaft and shifter rod UP as you would have to rebuild the lower gear box ).

The writer also warned about having the shaft out of the water when running, even for 5 seconds, as this could burn up the water pump.

So, I'm going to order a water pump rebuild kit, and stat gaskets.

Again THanks.. Great Link

Edited by - redeye on 05/01/2012 05:03:53

redeye
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Response Posted - 05/01/2012 : 06:17:33

Oh.. and thanks also Stu..

I've kept an eye on the Marineengine.com web site for years.

Edited by - on

szymek
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Response Posted - 05/01/2012 : 06:25:02

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by redeye
 
I have seen some people (me) pump it in from the bottom with a grease gun, lithium grease. Marine Bearing Grease.
<hr height="1" noshade id="quote"></blockquote id="quote">

I always do that. I buy marine gear box oil at my local store - not sure the consistency but it's quite liquid. I remove both screws and I squeeze the bottle and put in the oil from the bottom - until it starts coming out from the top. You just have to be quick to plug it. I hope I'm making sense here :-)

I do have a questions about my old evinrude... but I'll dig up the pic and I'll post it in another thread - don't want to hijack this one :-)

Edited by - on

redeye
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Response Posted - 05/01/2012 : 07:07:56

<>

GO for it..That's not a hijack to me.. this is supposto be abut old evinrudes.

Brien already helped me big time!

Edited by - on

szymek
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Response Posted - 05/01/2012 : 07:54:45

Ok here it goes. This motor is extra long shaft evinrude 9.9. I believe it's 1985.

Anyways... Have a look a the pic:

This is the most excessive as it has been.

I've look at the thread that was pointed out earlier (about 1/3 down the page):
http://www.sschapterpsa.com/ramblings/Johnson_9.9_troubleshooting.htm

Apparently this might be caused by ruptured fuel pump diaphragm.

I had friend of mine that knows few things about outboards, help me take out the diaphragm and we checked it... it seems to be solid - no raptures or anything like that. We cleaned it all off, but after a week or so I started seeing the black sludge again. So at at this point I don't have a clue what it is? Could it be just gunk built up in the shaft???

The motor is running perfectly fine - that's what boggles my mind. I've never worked on outboards - but i can find my way in a garage - but I've been little hesitant to mess around with it myself as long as it's running. But now that i got new motor, I might play around with it. First thing is to get it fixed and to learn more about that motor - as i know they're work horses!

One thing that I learned end of last season. I've been using 100:1 fuel mix. As per manual and sticker on the motor. But apparently back in the 90s they realized that's not enough oil and changed it to 50:1. Not sure whether this might have anything to do with it - i guess unlikely.

Edited by - on

Prospector
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Response Posted - 05/01/2012 : 08:19:57

Szymek, can you wipe it clean and take another photo in, say, 5 days?

Ours has a similar sludge leak but only from the exhaust ports. I wonder if teh leak is coming from further up teh shaft or if yours has found a second routing that ours is still looking for.

Edited by - on

szymek
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Response Posted - 05/01/2012 : 08:50:48

Prospector: motor is sitting in the garage right now. I had few issues with it over the last few years. It stalled on me couple times as I was coming into the marina (really sucks when you'er on your own) and sometimes when i throttle down too quickly it would just die on me and it would take me a while to get it going again - ok as long as I'm still out on the lake. But since I go single handed majority of the time, I've decided that I will invest in newer motor. I'm not sure what I will do with the Evinrude. I don't want to sell it for next to nothing and i don't want it to sit around for years and "rot" away.

Anyways... This started probably in 2010 season. I started seeing bit of sludge coming out of the little holes right above cavitation plate - looking at the manual i believe they're to relive back pressure. I've noticed that they were quite plugged with really thick gunk. So i took a pick and I picked out as much as I could and i blew it out with air compressor. Since then it started coming down quite a bit - now sludge. So I figured that that the sludge just built up over the years and now that i opened it up it started coming down. However, it hasn't stopped through entire last season. It gets worst after I motor quite a bit. So I'm not too sure what to do next.

Edited by - szymek on 05/01/2012 08:53:41

Joe Diver
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Response Posted - 05/01/2012 : 09:39:04

I'd pull that lower unit off and take a look......

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redeye
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Response Posted - 05/01/2012 : 10:14:31

Looks like your lower foot is leaking at the junction where the foot bolts on... I really could not tell from one shot. IF so I'd look at dropping the foot and putting some liquid gasket on that junction, after I read the manual. I don't know.. I've never seen that before. Is it coming from the exhaust? You could drain the foot, clean it up and put some sodium fluorescein in the gear oil, put it back together and see if it leaks. Put a crappy light ( blacklight ) on it and if it glows you know it is coming from the foot.

OR ... Put it on Craigslist and let someone else figure it out.

Edited by - on

redeye
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Response Posted - 05/01/2012 : 10:18:27

I always thought the fuel pumps were not worth rebuilding, you just bought another fuel pump and screwed the new one on.

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redeye
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Response Posted - 05/01/2012 : 10:22:37

<< I've been using 100:1 fuel mix. >>

You may have burned up the rings and now you are blowin oil.. if so now I would expect it to foul the plugs easily..

and of course the blue smoke.

Edited by - on

szymek
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Response Posted - 05/01/2012 : 10:27:25

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by redeye
 << I've been using 100:1 fuel mix. >>

You may have burned up the rings and now you are blowin oil.. if so now I would expect it to foul the plugs easily..

and of course the blue smoke.

<hr height="1" noshade id="quote"></blockquote id="quote">

I've replaced spark plugs every year. They didn't look anything out of ordinary. Also no blue smoke.

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