Recent Topics
Gen 8 Accord rear brakes-What tool?
by fdcg27. 09/21/18 04:30 PM
Ammeters?
by buck91. 09/21/18 03:55 PM
Need Help with Double D Knockers
by user52165. 09/21/18 03:41 PM
Opinion needed....
by Duffyjr. 09/21/18 02:56 PM
2017 nissan sentra
by jahwarrior1423. 09/21/18 02:47 PM
I Need A Safe Space- lol
by Zee09. 09/21/18 02:29 PM
Liqui Moly
by dawgn86. 09/21/18 02:10 PM
Valve issues
by kawie_guy. 09/21/18 01:54 PM
2018 Elantra SE
by wolf_06. 09/21/18 01:36 PM
Nasty looking oil filter
by atikovi. 09/21/18 12:43 PM
Laughing hard.
by StevieC. 09/21/18 12:26 PM
Apologies
by Drew99GT. 09/21/18 12:15 PM
Would Like the Manual Transmission to Make a Comeback?
by Speak2Mountain. 09/21/18 11:39 AM
Leaf Mulcher
by kwijibo. 09/21/18 11:32 AM
Pizza dough too crusty
by zorobabel. 09/21/18 11:26 AM
Lubegard Red or Platinum
by diyjake. 09/21/18 11:01 AM
Storing Car Outside
by Delta. 09/21/18 10:47 AM
Looking at a cheap commuter!
by ryan2022. 09/21/18 09:46 AM
Newest Members
JRMFt11, Navyretired, aikwae, ScottRousell, Direct_Rejection
66037 Registered Users
Who's Online Now
96 registered members (16HC, 53' Stude, 2009Edge, 92saturnsl2, 11 invisible), 1,666 guests, and 46 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics290,781
Posts4,850,183
Members66,036
Most Online3,590
Jan 24th, 2017
Donate to BITOG
Previous Thread
Next Thread
Print Thread
Hop To
Page 1 of 2 1 2
1977 Evinrude 15hp #4184011
08/22/16 08:46 PM
08/22/16 08:46 PM
Joined: Feb 2011
Posts: 1,265
Wishin' I was in Wi
mjk Offline OP
mjk  Offline OP
Joined: Feb 2011
Posts: 1,265
Wishin' I was in Wi
Picked up a Jon boat today. 2 questions:

a. what are the preferred plugs for these? Guy I bought it from likes Champion, never have run them before. Also, what is the part #?

b. Any harm running Amsoil 2 stroke oil through it? Just wondering if a full syn oil, on an older outboard, would cause issues. Otherwise, I have Mag 1 TCW3.

Thanks.

Re: 1977 Evinrude 15hp [Re: mjk] #4184019
08/22/16 08:55 PM
08/22/16 08:55 PM
Joined: Jun 2014
Posts: 1,968
IL
Vern_in_IL Offline
Vern_in_IL  Offline
Joined: Jun 2014
Posts: 1,968
IL
If I recall, the early models of the 9.9/15hp had a problem with the cylinder head design, and OMC came out with an improved head to be retrofitted to those motors.

I'd say anything in an 80's-and-up vintage is a pretty decent motor. When they're run a lot in salt, they have issues with the rubber upper water tube grommet squeezing shut, then you lose cooling. The 6, 7.5, and 8hp models (starting in the 80's) have the same problem.

Re: 1977 Evinrude 15hp [Re: mjk] #4184029
08/22/16 09:07 PM
08/22/16 09:07 PM
Joined: Sep 2014
Posts: 57
NY
stcif Offline
stcif  Offline
Joined: Sep 2014
Posts: 57
NY
I have a 1984 Evinrude 15 HP electric start. I use Champion plugs and the motor runs great. As for the oil I have been using Pennzoil so I have no expertience with Amsoil. I would think a synthetic would be fine though.

Re: 1977 Evinrude 15hp [Re: mjk] #4184074
08/22/16 09:47 PM
08/22/16 09:47 PM
Joined: Aug 2003
Posts: 12,898
NE,Ohio
Rand Offline
Rand  Offline
Joined: Aug 2003
Posts: 12,898
NE,Ohio
anything tc-w3 is fine.
Plugs I've used several all worked fine.

Might want to check out the carb and jet.




Last edited by Rand; 08/22/16 09:52 PM.

2019 Jeep Cherokee Trailhawk 2.0T
Re: 1977 Evinrude 15hp [Re: Vern_in_IL] #4184107
08/22/16 10:38 PM
08/22/16 10:38 PM
Joined: Feb 2011
Posts: 1,265
Wishin' I was in Wi
mjk Offline OP
mjk  Offline OP
Joined: Feb 2011
Posts: 1,265
Wishin' I was in Wi
Those are pre- 77 motors. In 77, they went to CDI ignitions. I had read about the issue you are pointing out.

BTW, where did you copy/paste that info from? I read it earlier in the night.

Originally Posted By: Vern_in_IL
If I recall, the early models of the 9.9/15hp had a problem with the cylinder head design, and OMC came out with an improved head to be retrofitted to those motors.

I'd say anything in an 80's-and-up vintage is a pretty decent motor. When they're run a lot in salt, they have issues with the rubber upper water tube grommet squeezing shut, then you lose cooling. The 6, 7.5, and 8hp models (starting in the 80's) have the same problem.

Last edited by mjk; 08/22/16 10:40 PM.
Re: 1977 Evinrude 15hp [Re: mjk] #4184149
08/22/16 11:33 PM
08/22/16 11:33 PM
Joined: May 2013
Posts: 2,093
Saskatchewan, Canada
Johnny2Bad Offline
Johnny2Bad  Offline
Joined: May 2013
Posts: 2,093
Saskatchewan, Canada
NGK in all my marine motors, 9.9 to 90 HP, 2 stroke and 4 stroke. But if I were looking at using something different, the last place I'd look for plugs would be the Champion catalog.


'57 FL Straight 50 wt
'90 Miata 1.8L w/Rotrex Supercharger [Mobil1 0W-40]
'96 Ram 1500 [3.7L Mobil1 0W-20 / 1L 15W-50]
'01 PT Cruiser [Mobil1 0W-40]
Re: 1977 Evinrude 15hp [Re: mjk] #4184171
08/23/16 12:29 AM
08/23/16 12:29 AM
Joined: Sep 2012
Posts: 2,191
VA
bvance554 Offline
bvance554  Offline
Joined: Sep 2012
Posts: 2,191
VA
I love old outboards. I don't know if it just reminds me of my youth and fishing with my Dad or what. Or maybe it was that old Seahorse that he had. I don't know what year it was, but it was old in 1980. I think I just liked the looks of it. Ran great. These things are easy to work on, and it will never hurt to check the jets as mentioned above. I've seen some nasty old carbs, and it wasn't the fault of ethanol. Does the motor have plugs in it? Is there a number? I'd use any TCW3 oil and not waste my dough on Amsoil. Have fun.

Re: 1977 Evinrude 15hp [Re: mjk] #4184201
08/23/16 02:08 AM
08/23/16 02:08 AM
Joined: Dec 2010
Posts: 2,007
grande prairie AB
abycat Offline
abycat  Offline
Joined: Dec 2010
Posts: 2,007
grande prairie AB
I have an old viking 5hp about a 1965. its on the back of my old 63 18' with a chrysler 50 on it. The 50hp is a 1965 as well. ngk in both of those.


2004 f350 6.0
2011 nissan versa hb
Re: 1977 Evinrude 15hp [Re: mjk] #4184264
08/23/16 07:02 AM
08/23/16 07:02 AM
Joined: Feb 2011
Posts: 1,265
Wishin' I was in Wi
mjk Offline OP
mjk  Offline OP
Joined: Feb 2011
Posts: 1,265
Wishin' I was in Wi
Thanks for the info. I have a quart of Amsoil on hand (I'd never buy it for this application). I use it exclusively for my Ice Auger, so I thought I better use up a bit of it this year. Probably just the first tank.


I typically use NGK plugs, so that was the direction I was going to go in. He claims he had more issues with NGK than Champion, which really struck me as odd. I'll look to see what is in the engine later this week.

So, NGK has the nod?

Re: 1977 Evinrude 15hp [Re: mjk] #4184593
08/23/16 02:28 PM
08/23/16 02:28 PM
Joined: Aug 2003
Posts: 12,898
NE,Ohio
Rand Offline
Rand  Offline
Joined: Aug 2003
Posts: 12,898
NE,Ohio
Is the amsoil meant for use in water cooled outboards or just air cooled 2 cycle?


2019 Jeep Cherokee Trailhawk 2.0T
Re: 1977 Evinrude 15hp [Re: Rand] #4184835
08/23/16 07:20 PM
08/23/16 07:20 PM
Joined: Feb 2011
Posts: 1,265
Wishin' I was in Wi
mjk Offline OP
mjk  Offline OP
Joined: Feb 2011
Posts: 1,265
Wishin' I was in Wi
Good call. I need Sabre, instead of the Interceptor. Looks like Mag1....

Well, wait..
Amsoil

Originally Posted By: Rand
Is the amsoil meant for use in water cooled outboards or just air cooled 2 cycle?

Re: 1977 Evinrude 15hp [Re: mjk] #4184838
08/23/16 07:21 PM
08/23/16 07:21 PM
Joined: Sep 2012
Posts: 2,191
VA
bvance554 Offline
bvance554  Offline
Joined: Sep 2012
Posts: 2,191
VA
Originally Posted By: mjk
Thanks for the info. I have a quart of Amsoil on hand (I'd never buy it for this application). I use it exclusively for my Ice Auger, so I thought I better use up a bit of it this year. Probably just the first tank.


I typically use NGK plugs, so that was the direction I was going to go in. He claims he had more issues with NGK than Champion, which really struck me as odd. I'll look to see what is in the engine later this week.

So, NGK has the nod?


I'd stick with the previous owners experience before taking a poll here. If he said he always used Champion, and NGK never worked, thats good enough reason to use Champion.

Re: 1977 Evinrude 15hp [Re: mjk] #4186700
08/25/16 11:44 PM
08/25/16 11:44 PM
Joined: Sep 2015
Posts: 5,855
Kalifornia Kollective
BrocLuno Online content
BrocLuno  Online Content
Joined: Sep 2015
Posts: 5,855
Kalifornia Kollective
An OMC motor (Johnson/Evinrude) of that vintage came with Champions stock from the factory. Prolly J8J or something similar.

I suspect it has manual hi/lo jets that can be tuned with the cover off and the engine running under load. Get a service manual for the motor off eBay and have fun smile

They were touting 50:1 back in the day when I was working part time in an outboard shop in Santa Cruz. Put some rings in those motors because they tried to do the factory 50:1 thing and they don't much care for it.

Have much better luck with 40:1 and any TC-W3 name brand outboard oil. I like Quicksilver oil. Can be had at Walmart for cheap enough. For first run with a new owner, I suggest a bit rich on oil for sure. Smoke never killed anybody, but just in case they straight-gassed it during demo or something, get some oil in there ... I'd pull the plugs and spray some Tri-Flow into the upper cylinders. It'll loosen rings that have been sitting and getting gummy ...

So the motor is approaching 40 years old. Mechanically it will be fine unless it's been abused ... As long as the compression is good, the cylinders are prolly fine. But the electrics can get iffy. The old connections tend to get corrosion and oxidation under all the contacts. As the resistance builds up, they start to fry coils. So pop the flywheel off and clean all the contacts and wire lugs. Reinstall all the wire leads with never seize. The screws that hold the coils down are the ground, don't forget those. New stainless star washers would not hurt. Then the ignition should be fine smile


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: 1977 Evinrude 15hp [Re: mjk] #4201062
09/12/16 08:16 AM
09/12/16 08:16 AM
Joined: Sep 2003
Posts: 5,770
Waterloo, ON
Bluestream Offline
Bluestream  Offline
Joined: Sep 2003
Posts: 5,770
Waterloo, ON
50/1 is fine, Post above is referring to when the factory went 100:1 with bad consensuses. Nothing but NGK plugs, and any BIA TCW3 oil is good. Sure you can use up the Amsoil


2000 VW Beetle 1.8T M5
2000 Ford Explorer 4.0 4X4
1991 BMW 735iL
"A fool and his money are soon parted" - Thomas Tusser
Re: 1977 Evinrude 15hp [Re: mjk] #4202431
09/13/16 10:08 PM
09/13/16 10:08 PM
Joined: Sep 2015
Posts: 5,855
Kalifornia Kollective
BrocLuno Online content
BrocLuno  Online Content
Joined: Sep 2015
Posts: 5,855
Kalifornia Kollective
50:1 was not fine in 1974... It might work if you got the right oil. It sometimes did not work out well at all if you did not. Oil was a lot more hit & miss back then than it is today. A lot of folks thought of 2-stroke oil as a throw-away, so they bought stuff at Western Auto and the like.

I still own and run some OMC's from the 1950's, the 1960's, the 1970's (2, 70HP looper and 140HP bubble back) and one from the 1980's. Don't own any Mercury's or Chrysler's (Mariner) or other stuff. Sold the only Honda outboard I ever had. But I do know my way around the odd OMC motor.

If you are running premium 2-cycle TC-W3 and you know the motor has been on it for a while - 50:1 is OK.

A new-to-you motor, with unknown history, no way. Get the thing oiled with at least one tankful a bit on the rich side with known good oil.


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Page 1 of 2 1 2

BOB IS THE OIL GUY® Powered by UBB.threads™