Null


Pages: [1]

ron.h

  • Karma: +1/-0
Starting problems with 15 horse Mercury
« on: February 21, 2017, 02:10:06 PM »
I have a 1989 15 horse Mercury outboard when checking the timing with a timing light it shows about 60 degrees before top dead center when I try to start it pulls the Rope out of my hand I have good spark on both cylinders does anyone have any ideas and I can't get it to start if I pull it really hard and if at about 40 degrees before top dead center while it's running

Sent from my SM-G930V using SoCal Jet Boats mobile app

Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

GT Jets

  • Karma: +192/-0
Re: Starting problems with 15 horse Mercury
« Reply #1 on: February 21, 2017, 02:54:38 PM »
Quote from: ron.h on February 21, 2017, 02:10:06 PM
I have a 1989 15 horse Mercury outboard when checking the timing with a timing light it shows about 60 degrees before top dead center when I try to start it pulls the Rope out of my hand I have good spark on both cylinders does anyone have any ideas and I can't get it to start if I pull it really hard and if at about 40 degrees before top dead center while it's running

Sent from my SM-G930V using SoCal Jet Boats mobile app
Sounds almost like the flywheel key let go.

Check the compression and the flywheel key before proceeding.

Has it ever run since you owned it?

Should be able to fire it up with your bare hands on the flywheel.... Seriously.

GT

Sent from my SM-G900V using SoCal Jet Boats mobile app

Logged
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
Quote from: Brad @ SoCalJetBoats.com on December 22, 2009, 07:40:31 PM
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Quote from: IRRebel on June 11, 2011, 07:30:45 PM
Time to man up and yank it John!  :banghead:
Ray

ron.h

  • Karma: +1/-0
Re: Starting problems with 15 horse Mercury
« Reply #2 on: February 21, 2017, 04:10:25 PM »
I can get it to start when it's running it's at about 40 degrees before top dead center at an idle it's just extremely hard

Sent from my SM-G930V using SoCal Jet Boats mobile app

Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

GT Jets

  • Karma: +192/-0
Re: Starting problems with 15 horse Mercury
« Reply #3 on: February 21, 2017, 04:44:55 PM »
Quote from: ron.h on February 21, 2017, 04:10:25 PM
I can get it to start when it's running it's at about 40 degrees before top dead center at an idle it's just extremely hard

Sent from my SM-G930V using SoCal Jet Boats mobile app
Did you have it apart?

What's the model number?

GT

Sent from my SM-G900V using SoCal Jet Boats mobile app

Logged
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
Quote from: Brad @ SoCalJetBoats.com on December 22, 2009, 07:40:31 PM
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Quote from: IRRebel on June 11, 2011, 07:30:45 PM
Time to man up and yank it John!  :banghead:
Ray

ron.h

  • Karma: +1/-0
Re: Starting problems with 15 horse Mercury
« Reply #4 on: February 21, 2017, 04:47:21 PM »
0g23385

Sent from my SM-G930V using SoCal Jet Boats mobile app

Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

ron.h

  • Karma: +1/-0
Re: Starting problems with 15 horse Mercury
« Reply #5 on: February 21, 2017, 04:49:46 PM »
No I do not have it apart

Sent from my SM-G930V using SoCal Jet Boats mobile app

Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

Lopes

  • Karma: +4/-0
Re: Starting problems with 15 horse Mercury
« Reply #6 on: February 21, 2017, 05:50:08 PM »
I know this sounds stupid but are you sure it not in gear?


Sent from my iPhone using SoCal Jet Boats
Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

GT Jets

  • Karma: +192/-0
Re: Starting problems with 15 horse Mercury
« Reply #7 on: February 21, 2017, 07:07:27 PM »
Do you have a picture of the flywheel? Do you know what marks to use?

The timing at throttle pick up should be extremely retarded, like 10° ATDC....
The wide open timing should be about 25°BTDC, I will be home soon and will grab a book.

Meanwhile, pull the flywheel nut and see if the key slot lines up.

Sent from my SM-G900V using SoCal Jet Boats mobile app

Logged
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
Quote from: Brad @ SoCalJetBoats.com on December 22, 2009, 07:40:31 PM
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Quote from: IRRebel on June 11, 2011, 07:30:45 PM
Time to man up and yank it John!  :banghead:
Ray

GT Jets

  • Karma: +192/-0
Re: Starting problems with 15 horse Mercury
« Reply #8 on: February 21, 2017, 09:12:16 PM »
So thinking about this over a bourbon and Coke, if the key is good, put a CDI box on it.

Good hunting.

GT

Sent from my SM-G900V using SoCal Jet Boats mobile app

Logged
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
Quote from: Brad @ SoCalJetBoats.com on December 22, 2009, 07:40:31 PM
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Quote from: IRRebel on June 11, 2011, 07:30:45 PM
Time to man up and yank it John!  :banghead:
Ray

ron.h

  • Karma: +1/-0
Re: Starting problems with 15 horse Mercury
« Reply #9 on: February 22, 2017, 03:52:43 AM »
From what I have read the CD box actually change the timing is that correct

Sent from my SM-G930V using SoCal Jet Boats mobile app

Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

ron.h

  • Karma: +1/-0
Re: Starting problems with 15 horse Mercury
« Reply #10 on: February 22, 2017, 03:52:57 AM »
I will take pictures of the flywheel tonight

Sent from my SM-G930V using SoCal Jet Boats mobile app

Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

ron.h

  • Karma: +1/-0
Re: Starting problems with 15 horse Mercury
« Reply #11 on: February 24, 2017, 07:02:42 PM »
I want to thank everybody for their help it was the switch box motor runs great thank you

Sent from my SM-G930V using SoCal Jet Boats mobile app

Logged
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party

GT Jets

  • Karma: +192/-0
Re: Starting problems with 15 horse Mercury
« Reply #12 on: February 24, 2017, 07:33:02 PM »
Quote from: ron.h on February 24, 2017, 07:02:42 PM
I want to thank everybody for their help it was the switch box motor runs great thank you

Sent from my SM-G930V using SoCal Jet Boats mobile app
Score...

Happy motoring.

GT

Sent from my SM-G900V using SoCal Jet Boats mobile app

Logged
  • Boat #1: 1992 Carrera 20.5 Elite (I/O bitches)
  • Boat #2: 19' Bubble deck Jet BBC Berkeley
  • Like
    Dislike
    Love
    HaHa
    Angry
    Surprise
    Sad
    Party
Quote from: Brad @ SoCalJetBoats.com on December 22, 2009, 07:40:31 PM
If i get some free time tonight at work, ill play with it and post it for everyone to see.

Quote from: IRRebel on June 11, 2011, 07:30:45 PM
Time to man up and yank it John!  :banghead:
Ray
Pages: [1]
 


Null

SMFPacks CMS 1.0.3 © 2025