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Need help identifying year of Mariner 8hp

D

DylanJay93

New member
Howdy all!
I’ve acquired my first outboard motor! No owners manual came with it and didn’t get much info on it. With much research and countless hours trying to find out, I was unsuccessful and need some help please!

8M 6G1 S 023824

Mariner 8HP
Model: 8M
Code: 6G1 S
SN: 023824

I do know..

8- 8Hp
M- Manual Start
S- Short Shaft


Then read something about the 6G1 was a Yamaha code

Thanks in advance for any info!
 
Thank you for your reply @Fun Times
Did I get lucky and possibly have a motor that is identical to a Yamaha or Merc? Parts are scarce for this motor everywhere I looked and I did see something where Yamaha and Merc came into play? I’m not a pro what so ever so any advice would help!
 
After much extended research, I've come to the conclusion this 1985 Mariner 8hp is identical to Yamaha's 1988 Marine Outboard 8hp 8sg <Yamaha Model 8C> ? About 99.9% and a hair on a monkeys asssterisk sure
 
A Mariner branded model made by Yamaha for Mercury Marine.

Equivalent of a Yamaha 1986 8SJ or 8LJ based on the shaft length. S for short and L for long.
 
Thanks for starting this thread DJ.

I too have a Mariner/Yamaha which I believe is an 1985 based on the tag which reads 8M 6G1 S 016440. From your and Boscoe's information, it sounds like it is likely an 1986-88 8SJ. My lower casing cap (aka bearing carrier) came to me with both tabs broken off which keeps me from rebuilding it, so I need a new one. Before I get out the calipers to measure or rage-order a bunch of parts that I'll have to return, I am hoping you or someone else here will know if a Yamaha brand lower casing cap will fit my Yamariner lower. The Yamaha parts are easier to locate and offer an assembly with pre-installed bearing and shaft seals. The parts diagrams online are very similar from Mariner and Yamaha (except for part numbers). Through my research I have compiled the following information.

The Mariner part number is 11648M which is just the casing cap

The equivalent Yamaha casing cap part numbers are:
6N0-G5361-00-00 (earliest I could find)
60R-G5361-00-4D (this could be a misprint)
6N0-G5361-00-4D
6G1-45361-01-EK
6G1-45361-01-4D
6G1-45361-01-8D (listed as current).

I have seen the assembly listed as 6N0-45361-00 .

There is so much misinformation out there, that I figured I'd try and ask someone else who has worked on one of these outboards. Any help would be greatly appreciated.
 
How are you coming to the conclusion that serial 6G1 S 016440 is likely a 1986-88 model year motor?

The 1984 8N model through 1991 8MSHP model all used a part number 99999-02228-00 cap.



 
Hi Bosco,

If you read my contribution to this thread (post #7), I identify that my outboard (8M 6G1 S 016440) is most likely a 1985 motor. I then went on to hypothesize that the Yamaha equivalent of my Mariner could be a 1986 to 1988 8SJ. I credited @DylanJay93 and you with providing that great information.

I am not questioning what year my outboard was produced. I'm also not looking for the Mariner part number since I had already looked that up.

The question I was asking was if anyone else with this model and year of outboard had ever substituted a Yamaha branded lower casing cap on their Yamaha built Mariner.
Today, I went ahead and bought a Yamaha casing cap assembly (6N0-45361-00) It was $20 with shipping so I figured it would be a cheap experiment. I'll report back with my results whether it fit or didn't fit. Hopefully my experience with attempting this can help someone else out.

Thanks.
 
From where did you source the 6N0-45361-00-00 part? That part number is not in the Yamaha USA system.

Seems to me that if your model used a 99999-02228-00 part number cap that is the part you would want to use.

Hopefully the part you are buying will work.
 
Bosco, I appreciate the help. The point of my post was not asking for help identifying and locating the parts, since I already found them. My goal was conversing with someone who had first hand experience installing this particular Yamaha part on a similar Mariner/Yamaha outboard. 99999-022228-00 is an "assembly" which consists of the cap and an o-ring but I would still need to purchase and install the bearing and two propshaft oil seals. What I ultimately purchased was a complete assembly which is the cap, o-ring, bearing, and two propshaft seals. The 6N0-45361-00 assembly supposedly covers many years and models of Mariner/Yamaha outboards and Yamaha outboards. We shall see...

Since there doesn't appear to be anyone with first hand experience who has done this type of part swap on this thread or in this forum, I decided to go ahead and order the Yamaha part and give it a try. I really hope it fits and works. I plan to post a follow-up after I have a chance to install it so that others can use this as a guide if they find themselves in the same position.

Thanks
 
prairiebuilder said:
Since there doesn't appear to be anyone with first hand experience who has done this type of part swap on this thread or in this forum, I decided to go ahead and order the Yamaha part and give it a try. I really hope it fits and works. I plan to post a follow-up after I have a chance to install it so that others can use this as a guide if they find themselves in the same position.

Thanks
Click to expand...
Seemingly unfortunate that as of late some boating forums like this one has really slowed down in participance possibly because now that there are more manufacturer specific and generalized boating Facebook group pages where it seems a higher number of daily experienced service tech minded people tend to hang out more and answer more directly 'questions of this magnitude, I'd tend to think this question would need to reach a broader range of people for a quick timeline answer if needed...

While some like to use Facebook, others may not sometimes possibly because most of the time, you'd be using your real name when/if ever joined vs a made-up username like here...That is of course one could always create a new account under a made-up name should one have little desire to heavily post away with boating experience under normal full names... I do read FB boating pages as of late but 98.5% of the time I don't post 'again mostly due to staying low profile of real name usage...It's just not for me. Should FB be for you then you might also want to consider posting the question in either of the two FB pages linked below as while you may get 70% of the wrong answer, 30% of the posters may help give you detailed help sooner than say here... < You'd of course have to weed out ones that may think they know but haven't actually tried it like you're asking...Either way, please post your finding here too because often we all learn together by doing and sharing...Good luck. :)

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@Fun Times

Thanks so much for the great ideas for alternative sources of information. I agree, there seems to be fewer and fewer participants with hands-on experience on these repair forums. I think it could be partially due to the rise of youtubers doing how to videos (that are rarely for the exact motor I'm working on) , or it could be that there aren't as many of us fixit yourselfers around anymore. Like you, what I find most frustrating is the amount of misinformation, goose chasing, and know-it-all's that seem to occupy the various forums. I guess we take what we find useful and let the rest slide past I'll continue trying to do my best to contribute without too much grandstanding!
 
As I get older, and the young whippersnappers get younger, it seems more folks now want to be followers. Always wanting to know (and now see via youtube) what others have done. Rather than being adventurous and striking out on their own paths.
 
@DylanJay93 Thanks for letting me add to your original post. I hope that the information I've provided will help you and others work on their chimera outboards with confidence (and cheaper and more available parts)

As promised, here is the moment some of you (well, maybe only me) were waiting for... The Yamaha numbered part fit my YaMariner lower unit casing perfectly! The assembly I ordered from AliExpress came with the lower casing cap (bearing carrier), the main bearing, the bushing (pre-installed), one thicker and one thinner o-ring, and the two shaft seals for $8.40 plus $10 shipping. The shaft seals and bearing were easy to install. The bearing had the same markings as the original Mariner branded part and the seals were, well, like other shaft seals I've installed. One thing of note was that the new carrier has a second groove on the prop end which holds the second skinnier o-ring. I'm guessing it was an improved design to keep the carrier from corroding to the gear housing. Everything matched up and fit perfectly into place with zero binding and normal (expected) seating force. I'd mark this down as a win for us do-it-yourselfers on a budget! Thanks to everyone who provided input on this adventure. Now, on to the next one. James







 
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