1994 Sea Rayder 90 HP sport jet manual and serial number location

$tefan

Cadet
Joined
Jul 28, 2024
Messages
6
I'm in a no spark situation on a recently purchased Force engine. I can't find the serial number only a range of numbers from the web. I could use help there and the flywheel has a sticker on saying "2 CYL ONLY" but all 6 magnets seem powerful. Does the trigger decide which magnet to get the spark from? Why the sticker? A manual and/or wiring diagram would be useful also. I'm quite green at this. I have 2 unmounted triggers and don't know where to mount one or plug it into.
 

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
18,037
The Boat/ jet ski should have a year embossed someplace, usually on the rear. That helps ID the motor. Figure out the year and then you can get a service manual.
You can add pictures using a photo sharing site, then after 5 posts you can post them using the Attach file button.
The 6 magnets just help produce electricity, the center of the flywheel has a spot that causes the trigger to fire as the flywheel turns.
DON'T mess with the timing adjustment as it can only cause trouble.
Outboards don't jump time like a car motor.
Just ignore the "2CYL ONLY" it means nothing.
 

$tefan

Cadet
Joined
Jul 28, 2024
Messages
6
The Boat/ jet ski should have a year embossed someplace, usually on the rear. That helps ID the motor. Figure out the year and then you can get a service manual.
You can add pictures using a photo sharing site, then after 5 posts you can post them using the Attach file button.
The 6 magnets just help produce electricity, the center of the flywheel has a spot that causes the trigger to fire as the flywheel turns.
DON'T mess with the timing adjustment as it can only cause trouble.
Outboards don't jump time like a car motor.
Just ignore the "2CYL ONLY" it means nothing.
Thank you. One Merc dealer and a local marine guy both said I needed a new $1200 flywheel and refuse to work on it. Can you tell me if the sport jet is an ADI alternator driven ignition? I need to know the type of ignition system so that I may gain an understanding of how things work. The Merc dealer couldn't tell me. Once I know what to google to I'm hoping that will set me on a correct bearing. Flywheel info is very scarce.
 

Jiggz

Captain
Joined
Oct 23, 2009
Messages
3,909
A pic is necessary at least showing the ignition system and the carb section. With this info you can actually deduce the year and type of ignition system you have

It would seem that all 90 HP starting from 1991 to 1999 have the Thunderbolt ignition system which uses the switchbox module. And only the 1990 90HP uses the Prestolite ignition system that uses a separate CD Module and coils.
 
Last edited by a moderator:

$tefan

Cadet
Joined
Jul 28, 2024
Messages
6
The Boat/ jet ski should have a year embossed someplace, usually on the rear. That helps ID the motor. Figure out the year and then you can get a service manual.
You can add pictures using a photo sharing site, then after 5 posts you can post them using the Attach file button.
The 6 magnets just help produce electricity, the center of the flywheel has a spot that causes the trigger to fire as the flywheel turns.
DON'T mess with the timing adjustment as it can only cause trouble.
Outboards don't jump time like a car motor.
Just ignore the "2CYL ONLY" it means nothing.
Here is a picture of some embossed numbers they don't look like Force numbers or engine numbers. I can't send pictures yet. D820244CW and G19D38.
 

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
18,037
Now that you have 5 posts. you should be able to add pics.
If the magnets aren't loose, then you probably don't need a flywheel.
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
49,554
Team, no one can currently post pics. there is a server issue preventing uploading new pics. The Mod team has reached out to the hosting admin, however we do not have a resolution as of yet.

you can use google pics or other hosting sites and post a link to them.
 
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