1999 GTS starting trouble

[n_fabrizio22]

Hello, I have a 1999 sea doo GTS I bought that needed a new MPEM. I replaced it with an aftermarket one from jetskiparts.com. I have also replaces all other electronics including coil pack, starter solenoid, voltage regulator and starter. It wants to turn over but the starter seems slow like a dead battery. I have been reading about the crankcase hydrolocking from oil, So I disconnected the oil hoses and let it drain. But I also read that if that happens there should be oil spitting out of the spark plug hole which it isn't. I even jump the starter with cables and it still seems to turn slow with the plugs out, and wont turn at all with the plugs in. Not sure what is left to do besides take it too a shop and pay the price. please help.

 

[noviceskier]

How old is that battery?

 

[n_fabrizio22]

How old is that battery?

a year old. but ive used 4 different charged batteries.

 

[ihammond]

Bad starter maybe? I had to replace one on a 4-Tec because it sounded like the battery was dying every time I started it.

 

[ihammond]

Does it turn easily by hand with the plugs out?

 

[mikidymac]

1. If there is no oil in the plug holes then it isn't flooding with oil.
2. Make sure you can turn the engine over easily by hand.
3. Connect a known good battery directly to the starter with jumper cables. (Be careful you don't weld the cables to the starter or damage the threads)

The most common cause of your issues is a bad battery from there bad starter and last is typically the cables.

 

[n_fabrizio22]

Does it turn easily by hand with the plugs out?

yes it does. it does get a little tough at one point and i hear the valves inside move but i assume that's normal

 

[n_fabrizio22]

1. If there is no oil in the plug holes then it isn't flooding with oil.
2. Make sure you can turn the engine over easily by hand.
3. Connect a known good battery directly to the starter with jumper cables. (Be careful you don't weld the cables to the starter or damage the threads)

The most common cause of your issues is a bad battery from there bad starter and last is typically the cables.

i put it up to my one year old car battery (not running) and it still did the same thing. I also have a new starter.

 

[noviceskier]

denso starter?

 

[n_fabrizio22]

denso starter?

No, it’s off of Amazon. The brand is “787”. Had the best reviews I could find

 

[mikidymac]

That could be your problem. All aftermarket starters are junk.

 

[n_fabrizio22]

That could be your problem. All aftermarket starters are junk.

What do you recommend I get?

 

[vogs77]

Get a good used one from Nick or Jess at SeaDoo MPEM | Used SeaDoo MPEMs
That is what I did with my 96 XP.

 

[n_fabrizio22]

Get a good used one from Nick or Jess at SeaDoo MPEM | Used SeaDoo MPEMs
That is what I did with my 96 XP.

What would the MPEM have to do with the motor not turning over correctly if I jump the starter directly

 

[mikidymac]

The MPEM has nothing to do with it.
He was just giving you the contact information for Nick and Jess at Westside Powersports.

 

[n_fabrizio22]

The MPEM has nothing to do with it.
He was just giving you the contact information for Nick and Jess at Westside Powersports.

Ohhh okay thank you