Jump started

Chente0313

Active Member
Messages
3
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0
Water Crafts
1997 bombardier
1997 gxp
#1
Hey guys. New to the forum. New to jet skies . I tried jump starting my 97gtx, it Sounded like it wanted to crank over then It just died. Is there a fuse box. Or did I fry the ?
 


riffe723

Active Member
Messages
356
Likes
33
Water Crafts
(2) SeaDoo SPX - 1997 (sold)
SeaDoo Speedster SK - 1999
(2) SeaDoo Spark 90hp - 2016
#2
There’s a big sticker under the seat that says to never jump start.
 

tobytd

Active Member
Messages
132
Likes
8
Location
Norris Lake, TN
Water Crafts
98 GTX
97 GTX
96 Polaris SLT 700 (sold)
#3
NEVER jump start a Seadoo. Charge battery with cables disconnected. Voltage spikes / over voltage etc will 'fry' MPEM. Remove spark plugs & ground plug wires, then spin motor. Cover plug holes beware of oil from bad rotory valve seals {maybe}.
 

mikidymac

Moderator
Staff member
Moderator
Messages
10,051
Likes
818
Location
California
Water Crafts
2003 GTI
2001 XP
1996 XP
1996 HX
1991 Superjet
2001 Superjet
#4
First get a good battery. Second check all fuses. Third pray you didn't fry the MPEM. 4th never jump start a ski.
 

Chente0313

Active Member
Messages
3
Likes
0
Water Crafts
1997 bombardier
1997 gxp
#7
my Brothers friend was tired of seeing them, $0.00, now I got a problem I checked the fuses installed fully barged battery , no signs of life , what are the steps on installing MPEM Do I buy one and just plug in or does it have to be programmed. Thanks again
 

jts32

Active Member
Messages
243
Likes
24
Location
Wisconsin
Water Crafts
1994 Century 190, 1996 GTX, 2x 1996 Challenger, 1997 GTX, 1997 GSX, 1997 GTi, 1997 Sea Ray 330 Sunda
#8
As long as you get a matching DESS key with the MPEM, you will not need to have it programmed. Otherwise you will have to have your current key programmed to match the new MPEM.
 

tobytd

Active Member
Messages
132
Likes
8
Location
Norris Lake, TN
Water Crafts
98 GTX
97 GTX
96 Polaris SLT 700 (sold)
#9
GTX has 2 grounds at battery. One big, one small. If the small one (from e-box ) is left off -- no crank.
 
Messages
40
Likes
14
Water Crafts
1996 Sea-Doo GTI
1994 Sea-Doo SPX
#10
If it is you’re MPEM, Do not go to eBay to buy the cheap one you’ll find. Only get an OEM on this. Check out Westside Powersports for a good used unit.
 

DooWacka

Active Member
Messages
252
Likes
17
Location
Littleton, CO
Water Crafts
currently four 2001 GTX DI
#11
As already said, you shouldn't jump start.
However, the MPEM can and may survive if jumped from a well regulated source. Go through troubleshooting before automatically assuming the worst. When I was a noob, I had all 4 of mine survive jumps.
If you don't have a manual, you can get a manual online by searching seadoo manuals.
Use a fully charged battery, then follow the electrical and starting troubleshooting checks.
 

artr

Member
Messages
7
Likes
1
Location
connecticut
Water Crafts
1996 Sea Doo GTX
#12
Press the start button without the key installed and see it the gauges light up for 30 seconds. If they do it is a good sign that your MPEM may be ok. Did you check all the fuses. There are 2 in the front electrical box on the MPEM (15A and 5A). There is also a 5A fuse in the rear electrical box that protects the starter solenoid. If your gauges light up but the motor does not crank when the key is installed, then that fuse may be a problem. What exactly does the ski do when you plug in the key and try to start it?
 

soccerdad

Well-Known Member
Messages
1,652
Likes
8
Location
Jamestown, NC
Water Crafts
'96 GSX- Lemonade
'96 GTX- Shamu
2006 Bayliner 185, 3.0L
#13
So for full accuracy, jump starting a Seadoo is NOT a problem done correctly. You can't use a high voltage booster box, and you shouldn't do it from a running vehicle. BUT, there is no harm in jumping it from another 12V power source like a car battery or other ski. As long as it isn't running, you are fine. And remember there are fuses in both the front and rear electrical boxes.
 

DooWacka

Active Member
Messages
252
Likes
17
Location
Littleton, CO
Water Crafts
currently four 2001 GTX DI
#14
That is correct.
But remember the standard precautions on all boats, of no sparks in enclosed spaces with any fuel vapors present. Usually not a problem on Seadoos.
When Seadoo voltage regulators go out, you can sometimes get high and variable voltages while running that can drive the MPEM nuts with lots of strange engine behavior, but I have never heard of this blowing the MPEM.
 

etemplet

Premium Member
Premium Member
Messages
1,972
Likes
143
Location
Louisiana
Water Crafts
1996 SPI, 1996 GTX, 1997 GTX
#15
Since we are on the subject. does one need to disconnect "both battery cables when charging the battery or will "one" suffice? I always disconnect both cables but I have battery disconnects on two of my skis. I still worry about voltage issues so I am a bit leery about leaving even one path for external voltage to wreak havoc. :)
 

etemplet

Premium Member
Premium Member
Messages
1,972
Likes
143
Location
Louisiana
Water Crafts
1996 SPI, 1996 GTX, 1997 GTX
#16
The Green GTXs are by my favorite skis. The two skis I plan to keep are a 96 and 97 GTX. They do all I need and do it well !! Regarding your problem.... Take your time and do your checks first.

CASE IN POINT - When I bought my 96 GTX the owner was there with his buddies and to show me the ski turned over he put a jump-box on the ski to get it spinning. At the time I didn't know any better. But the ski survived. with no issues at all.

Another CASE IN POINT On my 1997 I was testing stuff and got the cables crossed up ....yes backwards. I didn't get it connected but I saw the spark. It only blew the fuse... whew !! Thank you Lord. :D :D That was the only system on the 97 that was good. The engine was toast. LOL GOOD LUCK !! Mark those cables. !! :D :D
 

artr

Member
Messages
7
Likes
1
Location
connecticut
Water Crafts
1996 Sea Doo GTX
#17
Since we are on the subject. does one need to disconnect "both battery cables when charging the battery or will "one" suffice? I always disconnect both cables but I have battery disconnects on two of my skis. I still worry about voltage issues so I am a bit leery about leaving even one path for external voltage to wreak havoc. :)
Technically you only need to completely disconnect one side (either one) of the battery because then there is not a complete circuit path for charging current to flow into the jetski's electronics or for the jetski's electronics to be affected by the higher charging voltage. But why take any chances, you should disconnect both to insure no accidental connections occur when charging.
 
Messages
1
Likes
0
Water Crafts
95 seadoo do 717
#18
So I’m new to the forum and I’m in a bit of a pickle, I’ll start off by saying that I have a 1995 xp 717, I jump started my jetski and started a whole cluster of problems, I got a completely new electrical system however the jetski will start and run for about 20 seconds until it blows the 15 amp And the 5 amp fuse then shuts off the engine.. any idea how to fix this??
 

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