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  1. #1

    Cool School Shop Teacher needs help

    Hi Guys, I teach a secondary school shop class and we picked up a (01/24/1989 70Hp) Mercury yesterday and wanted to order service/owners manual but cannot find it on the mercury site. The paperwork and the dealers MercNET site shows serial # 0A748383 and M# 10704129C. But why is it not searchable on mercury's site for parts or manuals? The serial number on the motor is not readable, just too old and faded, the plug says A748383. Any help is appreciated. The dealer is gone on vacation so I cannot get him for a month.

  2. #2
    Join Date
    Feb 2019
    Location
    Portland, OR
    Posts
    2

    Default Re: School Shop Teacher needs help

    Serial number should be stamped on a welch plug on the engine (won't fade out) Is this a large bore 3 cylinder 70 r the 3 cylinder 2 carb model? If it's the large bore the manual would be 90-13645-21095. If it is the small bore it would be 90-86135-51-593. This is according to a service manual index. Hope this helps.

  3. #3

    Default Re: School Shop Teacher needs help

    Quote Originally Posted by Factoryphred View Post
    Serial number should be stamped on a welch plug on the engine (won't fade out) Is this a large bore 3 cylinder 70 r the 3 cylinder 2 carb model? If it's the large bore the manual would be 90-13645-21095. If it is the small bore it would be 90-86135-51-593. This is according to a service manual index. Hope this helps.
    Thank you so much for your info as we still have not found the manuals. It is a 3 cylinder 3. Carb motor. The welch plug has A748383 on it. Thats all for numbers other than what was posted. We appreciate any info that can shine some light onto this as we try to do everything “by the book” ... if we can findone!

  4. #4
    Join Date
    Jan 2010
    Location
    Posts
    995

    Default Re: School Shop Teacher needs help

    Serial Number A748383 is coming up as an MERCURY CANADA 70 ELPTO Model Number 10704129C

    70-H.P 1989 ELPTO US Serial Number Range C100000 - UP / CANADA START SERIAL # A742531 = 1989... <No question on the year model in my findings.

    E = ELECTRIC START
    L = LONG SHAFT (20")
    PT = POWER TRIM
    O = OIL INJECTION

    Since your Model number 10704129C isn't coming up to help ensure a correct parts guide I was able to locate 3 others that are close enough that will work for your part searches all from the 1989 year models... If you search online the 3 model numbers below you'll find a few options to choose from...One is linked as an example.


    70 [ELPTO]
    10704129D https://www.crowleymarine.com/mercur...cfm?mdl=TEIKSF
    1070412GC
    1070412GD

    OEM Service Manual part number 90-13645--2 covers engine models,
    70/75/75 Marathon/75XD/75 Sea Pro 80/90 (3 Cylinder) 1987 thru 1993 AND 100 & 115 (4 Cylinder) 1988 thru 1993
    (U) 0A997142 thru 0D283221 (B) 09502135 thru 09793576 (C) 0A722297 and Above
    (U) 0B209468 thru 0D283221 (B) 09523034 thru 09793576 (C) 0A731673 and Above

    https://www.ebay.com/sch/i.html?_fro...45--2&_sacat=0

  5. #5

    Default Re: School Shop Teacher needs help

    Quote Originally Posted by boat_tech View Post
    Serial Number A748383 is coming up as an MERCURY CANADA 70 ELPTO Model Number 10704129C

    70-H.P 1989 ELPTO US Serial Number Range C100000 - UP / CANADA START SERIAL # A742531 = 1989... <No question on the year model in my findings.

    E = ELECTRIC START
    L = LONG SHAFT (20")
    PT = POWER TRIM
    O = OIL INJECTION

    Since your Model number 10704129C isn't coming up to help ensure a correct parts guide I was able to locate 3 others that are close enough that will work for your part searches all from the 1989 year models... If you search online the 3 model numbers below you'll find a few options to choose from...One is linked as an example.


    70 [ELPTO]
    10704129D https://www.crowleymarine.com/mercur...cfm?mdl=TEIKSF
    1070412GC
    1070412GD

    OEM Service Manual part number 90-13645--2 covers engine models,
    70/75/75 Marathon/75XD/75 Sea Pro 80/90 (3 Cylinder) 1987 thru 1993 AND 100 & 115 (4 Cylinder) 1988 thru 1993
    (U) 0A997142 thru 0D283221 (B) 09502135 thru 09793576 (C) 0A722297 and Above
    (U) 0B209468 thru 0D283221 (B) 09523034 thru 09793576 (C) 0A731673 and Above

    https://www.ebay.com/sch/i.html?_fro...45--2&_sacat=0

    On behalf of our shop class, thank you so much for your insight and assistance in securing more detailed information as well as access to the manuals. We have started training the next generation of marine techs.
    Best,
    Martin

  6. #6
    Join Date
    May 2007
    Posts
    9,199

    Default Re: School Shop Teacher needs help

    If you want to save a few more bucks here I have the manual (merc factory manual) for that motor in pdf form. If you drop me an email at [email protected] I can send it to you in a few emails (it's broken down into 7 chapters and some sub-chapter pdf files so the overall manual is fairly large so mails easier in smaller chunks).
    Graham

    A "professional" is someone who gets paid for their work - it doesn't necessarily mean they are good at it :)

  7. #7

    Default Re: School Shop Teacher needs help

    Quote Originally Posted by galamb View Post
    If you want to save a few more bucks here I have the manual (merc factory manual) for that motor in pdf form. If you drop me an email at [email protected] I can send it to you in a few emails (it's broken down into 7 chapters and some sub-chapter pdf files so the overall manual is fairly large so mails easier in smaller chunks).

    This is an amazing offer...thank you. We did not get any budget for our marine program, so I have been financing it from my pocket for the students. They are very motivated and anxious to get started so after a few "step by step" lecture periods with your manual, the "marine team" will get busy! My email is on the way.
    Best,
    Martin

  8. #8
    Join Date
    Nov 2011
    Location
    tennessee
    Posts
    3,394

    Default Re: School Shop Teacher needs help

    Make sure it the correct manual as it needs to be 90-13645-2 as this is a looper not a crossflow. If you need correct one PM me your email. Where are you located???
    Pappys Sales and Service
    Owner and Factory Certified Technician
    Former racer KDBA (Kentucky Drag Boat Association)

  9. #9
    Join Date
    May 2007
    Posts
    9,199

    Default Re: School Shop Teacher needs help

    That's the manual I made available to him.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	manual.jpg 
Views:	20 
Size:	63.3 KB 
ID:	19531  
    Graham

    A "professional" is someone who gets paid for their work - it doesn't necessarily mean they are good at it :)

  10. #10

    Default Re: School Shop Teacher needs help

    Quote Originally Posted by faztbullet View Post
    Make sure it the correct manual as it needs to be 90-13645-2 as this is a looper not a crossflow. If you need correct one PM me your email. Where are you located???


    Hi Fazbullet,

    Thank you for your message, very kind of you to reply. Indeed the manual that Graham sent to us is 90-13645-2

    Best,
    Martin

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