parts location

[poindexter]

Hi.
I picked up a project seadoo.. 99 GTX RFI... I yanked the engine and sent it out to be rebuilt ( it was a bit more complex than a standard outboard)... its now going back into the hull and have the manuals etc... My problem? when I got the boat it was stripped somewhat such as rave valves and MPU etc...
I have been getting parts as I go.. Here is the problem... I went to a seadoo dealer to ask where the computer module is located and he would not talk to me... the manuals don't show it... does anyone know where it is suppose to go???? I am looking for the wiring harnesses for it in the hull, but it is either not there or hidden from my normal view... someone did say that it is under the front cover and some say its close to the battery... I would like to know before I lift the engine back into the hull...
any thoughts?????
Thanks.
:ack:

 

[Dennis]

Mpem

The MPEM (computer module) is suppose to be mounted to a metal bracket under the front hood at the left front of the ski.
DAWG

 

[poindexter]

thank you, I will check when I get home... also, the voltage regulator , rectifies 3 phase then regulates it from 13 to 14.5 volts, do you or anyone know the wattage of this... This is also missing and since my business is electronics, I would make up a charging system that is overkill...
thanks for your info... I was looking in the wrong spot.. ( figures...):ack:

 

[Dennis]

Wattage

I'm not sure if this is what your asking for but the magneto output is 270 watts. I'm curious as to how you would beef up the charging system. You gotta be careful because of the other componets that come into play besides the battery.
DAWG

 

[poindexter]

Hi .
No, I am not trying to beef up the charging system at all... I am just building a regulator for it rather than paying the 250 dollars they want for a used one up here in Canada... but it might end up being larger than I expect it to be...
I did not realize how much stuff was removed from the hull before I got to it... but I am in to deep to forget about it... I only need a couple more parts..
I did get a great price on the engine rebuild from East coast Cycle In PA... for 750 complete while up here they were begging for the business at 2300 for the same job... wow...
thanks for the comeback..
Stan

 

[seadoosnipe]

Regulator/rectifier?.....

DAWG is correct. The 787 RFI engine uses a 3 phase, Delta wound stator on 18 poles. The output if 270 watts at 6000 rpm.

The magneto creates high voltage AC current which is converted to DC current by the rectifier then regulated to 14 to 14.5 volts DC current.

I see your trying to put something together instead of buying one. Well, if you buy the MPEM, which is about $1000 bucks, I hope you don't blow it by putting something together verses paying $159 for the rectifier/regulator.

I hope you realize how intricate the electrical system is for this model RFI engine. You can't bypass or jury rig to get this motor to run.......but, as one who likes to McGyver as much stuff as I can, .......good luck!:cheers:

 

[poindexter]

Hi again.
First of all to Dawg, Yes I found the module right were you said it would be, hidden out of sight...
Regarding the rectifier/regulator, I do realize the hazzards of blowing things up... I work in the wonderfull world of electronics and building projects is one of my past times... however your right that I don't wish to make a mistake and take out the computer and other things... I will keep looking around for the unit... like I said its overpriced up here and can make one easily for about 40 dollars at twice the wattage... ( I mostly have to refurbish a number of obsolete devices at work to keep things going... but will see what I can come up with with OEM...Actually I may call east Coast Cycle to see if they can send me one...
thanks for your concern, it really makes a forum that much more meaningfull...
One more thing... the manual specifies that the injection oil be bombarier only... is this a sales gimmic or since it is a rotax engine, should it be a special type rather than the regulare high grade low ash 2 stroke oil I used on my outboards???
regards.
Stan

 

[timmyboy76]

2 part #'s

probably already know, but #278001554, will also work, along with #278001241.......good luck

 

[poindexter]

Thanks to all for the info... I went to the dealer as got the proper rectifier/regulator, better be safe than sorry especially on a 0 hour engine.
the book says to use 97 octane but the dealer said 87 was good enough and designed for it... any thoughts?.. its a 99 gtx-FI 787, and he strongly suggested to run the synthetic oil..( ouch $65 per Gal. for the seadoo brand)
tks.
Stan

 

[nswillin]

Seadoo recommends that you run 87 oct if everything is stock. The Seadoo XP-S syntheic oil is the best to use for your engine. There are some other brands out there.
They have to meet these requirements:
High quality low ash API TC

DO NOT USE 4-stroke petroleum or synthetic motor oil and never mix these with outboard motor oil. Do not use NMMA TC-W, TC-W2 or TC-W3 outboard motor oils or other ashless type 2-stroke oil.

DO NOT mix different brands as well.

 

[poindexter]

Thank you very much for your input and advice.. it is greatly appreciated.. I am use to outboards or I/Os so this is a real treat for me and my son.. I love it when things come together.
cheers.
Stan:hurray:

 

[poindexter]

parts location... possible bildge pump/blower...

HI folks.
Now that everything is well under way.. I noticed that there is no blower or bildge pump... the diagrams show nothing so I assume it is not needed ( I find this hard to beleave)... however, do people put in blowers to vent the cavity of the engine compartment? and if I were to install a bilge pump before the engine goes in .. where would it go??? the engine cradle is the lowest point and once the engine is installed, there really is no room for even the smallest pump so far as I can see... any thoughts???
sorry to be a pest..
thanks.
Stan

 

[Dennis]

Blower/bilge

I've never seen a ski with a blower. I recommend that you always remove the seat before you fire it off for the first time and look for fuel leaks and to let normal vapors vent. A bilge would be difficult to install and really not necessary if your ski doesn't have any leaks. The hull will take on some small amount of water as you use the ski but the factory passive vacuum bilges in the bottom of the hull usually are more than adequate. If your ski is taking on enough water that you feel you need a electric bilge pump then your ski has a big enough leak that you should locate and repair it.
DAWG

 

[poindexter]

THanks Dawg.
IN that case, I am ready install the engine with no additional wiring... I really do think that a blower would be handy. as I always keep my blower running in my boat(s).. no-one wants to sit on a potential ejection seat... although it could be fun if you wear a parachute.. ( not at my age)...
thanks again for the input...
Stan

 

[seadoosnipe]

Blower.....

:agree: with DAWG.......the bailer tubes are more than enough to keep you hull drained.

A blower is not necessary since the ski has air vents for the carbs to breath...but, like DAWG said, I'd remove the seat if it hasn't been run in a long time so that you can inspect it for leaks.........:cheers: