Rectifier

[Mike77802]

Anyway to test a rectifier on a 1999 gsx/rfi? Voltage reads 12 volts running or not, both fuses good.

 

[timmyboy76]

Quote from difrent site...Highly Respected Moderator
Just unplug the red wire on the rectitfier, if it runs good, replace rectifier.

 

[Mike77802]

It runs good when the battery is fully charged but after a period of times starts blinking 12volt low and eventualy dies and wont start without charging the battery. Battery is new, starter is new.

 

[timmyboy76]

Bad rectifier....good one would make batt, when motor is running at 13.5-14v.
I think it acts like an alternator...
OEM#278001554...seadoosource.com, parkeryamaha...close in price

 

[Mike77802]

Seadoo Tech has one for a 787 RFI engine for 69.00 is this the same one? looks the same.

 

[timmyboy76]

May look the same, but i'd double check w/ #
278001554 RECTIFIER-ASSY, 2000 UP 787 RFI ...out of these years???

 

[robin savell lloyd]

It probbly is a bad rectifier but you may want to check and see if you have voltage coming from stator ( magneto ) and going to the rectifier. :cheers:

 

[kustomkarl]

Here is some information on the charging system.
When the engine is running, set your voltmeter for 20 VDC and put the leads on the correct terminal posts. With the engine running, you should be reading anywhere from 14.5 to 14.8 VDC. (typically this test is done at 5,000 rpms) This tells you your charging circuit is good. If the voltage is higher, the regulator is bad. If you’re not showing a charge and you've replaced the rectifier, you may want to do a test on the Magneto/stator/charging coil. If you’re not a premium member and you don't have access to a manual, this test will be hard to do without it. There are 2 fuses that protect the charging system. Check the 15 amp fuse in the MPEM and the 15 amp fuse between the solenoid and the MPEM.

The magneto and stator create un-regulated AC current. The "rectifier" converts that AC to DC current and the regulator maintains the current between 14 to 14.5 volts DC for the engines operation and charging circuit.

I hope this helps.

Karl

 

[timmyboy76]

Thanks Karl....cut/paste'n it for future reference

 

[kustomkarl]

That 's the way to go or just sign up for premium membership and get the complete test from the service manual. As a premium member you can down load a authentic seadoo manual from the seadoo manual library. In the library is a variety of manuals for almost all years and models. You can view as many as you like on line as a PDF file, or download it and print it for your personal and privet use. There are operator manuals and repair manuals for you to do your own repairs on your seadoo. The repair manuals have everything from troubleshooting, repair procedures to winterizing. It contains wire diagrams torque specs and pictures for disassemble and assemble instructions. In the spec sheets it tells everything needed to maintain oil changes, spark plug gaps, carburetor rebuilds and impeller wear ring tolerances. Click on the "Seadoo Manuals" link at the top of the page for more details. If you need any help or get in a jam, we are always here to answer your questions too. Premium members get priority when it comes to getting quick detailed answers.


Karl