Where is the electrical rectifier/regulator for 1999 GTX Limited Engine 951

[Tonyschawks]

I have downloaded User manual, parts manual, and service manuals. The problem with the manuals is that it tries to capture too many models and there is nothing specific to the 1999 GTX Limited Engine 951. Before you comment, I am little above an amateur for electrical work and can fix most problems following electrical diagrams. I have validated that my rectifier/regulator is not working since the voltage increases above 14.5 V when revving up engine and I ALWAYS have to recharge the battery after daily use (approximately hours of run time).

I have confirmed the following for my specific model::
1) The regulator is NOT located on the MPEM similar to 947 engines.
2) The regulator is NOT located near the rear electrical box similar to GTX RFI models.

The electrical diagrams in the manual only shows a flow chart (no diagrams or pics) where the location of the regulator is. The closest thing that I discovered is a youtube video for a 2002 GTX which shows the rectifier/regular under the engine towards the fuel tank. If that is the case then I will to attempt to remove engine components when I winterize and I will just be stuck with charging the battery after every use (pretty lame and frustrating). This has been an going problem for years but was not an issue for me since recharging the battery was a simple chore until I hurt my back.

Reading multiple sights, the regulator seems to be a common issue for owners where it appears to be more of a design flaw. If any novice out there can share a picture and/or diagram for my 1999 GTX Limited Engine 951 it will be greatly appreciated. As an added bonus, if you can help me trouble shoot why my fuel guage does not read the fuel level (LED is literally blank), I'll mail you a new comic book.

 

[dps]

Your rectifier/regulator is internal of the MPEM on your model, it not external like the DI and RFI.

 

[mikidymac]

OSD does have an external regulator conversion for the internal ones.

 

[alkiseadoo]

OSD does have an external regulator conversion for the internal ones.

And I did mine works great. Make sure you get the cable also

 

[Tonyschawks]

Thanks. OSD stands for what? Shoutout to fellow Seattlite on Alki. Bypass picture would be great.

 

[Mraw]

Here is the rectifier

https://osdparts.com/index.php?main...roducts_id=8&zenid=nfbblu75uep0anrjhlqd3edob0
Here is the wiring harness

https://osdparts.com/index.php?main...cts_id=15148&zenid=nfbblu75uep0anrjhlqd3edob0

 

[val-e-vue]

Your fuel gauge problem is most likely caused by a blown fuse on the baffle circuit board. You can test your gauge using a resistor. Unplug the connector on top of the gas tank and connect a 50 ohm resister. The gauge should be around 1/2 full (4 bars). The resistance chart is in the shop manual, so you can double check my values.

The fuse is not meant to be serviceable. It is located inside the fuel baffle. You will need to remove it from the tank. Verify the fuse is blown by doing a resistance check at the connector. If the circuit is "open", you can bet the fuse is blown. You will find a video on-line where a guy does a hack job on the baffle and eventually finds the fuse. I used his experience and spent more time locating the fuse and made a nice rectangular opening below the baffle flange. It provided adequate access to remove the surface mount fuse and replace with a jumper. I then added a .25 amp fuse to the baffle supply line (external). I didn't want to worry about sourcing a fuse that would be safe and hold up while being submerged in gasoline, so I mounted it external. Since my baffle cut was below the flange, there was no need to replace the piece. The video shows welding the removed piece back in place, but this is not required if you stay below the flange.

While you are in there, check your float. Mine had gas inside and the magnets were starting to crumble. OSD has replacement floats for a reasonable price.

 

[Tonyschawks]

Your rectifier/regulator is internal of the MPEM on your model, it not external like the DI and RFI.

I wanted to give a shout out to Dave at Daves Performance Shop. The man knows what he is talking about and has a high quality solution to bypass the regulator. Perfect length to the MPEM, stator, and battery. Thanks Dave for solving a 3+ year problem for me!

I am sure the 4 tec sea-doo may have resolved the regulator design flaw but it is lame that the regulator is an irreplaceable part within the MPEM for my model.. For those of you who are stuck with just the manuals, the stator is located between the bottom of the engine and gas tank on the 1999 GTX Limited 951.

Thanks all for the tips to resolve the fuel tank sensor issue. I will give it a go when I winterize. Have fun and stay safe everyone!