Need a local mechanic. Replaced MPEM stiill no spark

[DnE1800twin]

Seadoo 1800 twin 787s. No spark. Tired of messing with it. I'm looking for a good mechanic somewhat local to Ocala Florida. I've done all I can do. Just spent another $1000 to replace MPEM. Still no spark. Battery is good. Connections are good. I have not checked the stators or tested the wires coming out. Someone told me how to make a test plug to put an ohmeter on but I forgot. I'm getting burned out on this thing and just want someone to look at it and tell me what to fix. I need help

 

[ialonso]

Don't give up

Seadoo 1800 twin 787s. No spark. Tired of messing with it. I'm looking for a good mechanic somewhat local to Ocala Florida. I've done all I can do. Just spent another $1000 to replace MPEM. Still no spark. Battery is good. Connections are good. I have not checked the stators or tested the wires coming out. Someone told me how to make a test plug to put an ohmeter on but I forgot. I'm getting burned out on this thing and just want someone to look at it and tell me what to fix. I need help

I'm sorry to hear. I'm in Houston and nobody here wants to work on my boat. Once I found a great shop in a near by city (I'm in Houston)they did great work, but they closed a year or two after I found it.

Looking at the shop manual (Sportster/Challenger 1999 1800 share it) to test the trigger coil, it says there is a harness to test, and you connect to white on one side and Black/Yellow on the other. They use a pigtail to test so I can't be sure that the colors are the same on the boat. Resistance should be 190-300Ohms


Your spark plug cables start at the coil. Long ago when I was troubleshooting a similar issue (and it was the coil that was bad) I put an LED between ground and the small cable going to the coil. as I cranked the engine I could see the LED flicker when the spark was being "requested" of the coil. That may help you determine if it's the spark coil or the trigger coil. It probably would take you 30 mins tops while having a beer to disassemble the black electric box and hook up the test.

If you determine it is the stator, maybe you can find a local jet-ski shop willing to swap it. I would suspect the engine has to come out, but someone else can talk to it.

If it's the coil, It is a PIECE of cake to swap, and in fact you will have done 1/2 the job by opening the electric box.

Good Luck!!! Don't loose faith, they are fun to run, but it also has to be somewhat enjoyable to work on it for you until you get it running well. otherwise it's a pain the @$$ (unless you find a good and trustworthy mechanic. They are not unicorns because I have seen them before, but they sure are HARD to find)

 

[DnE1800twin]

Thanks for your input. I still need to replace the coil wires so that everything from the stator to the engine will be new. If still no spark i will pull the engines and remove the stator cover. I'll probably build a gantry crane next week so the motor can out.
I need to build the crane anyway to replace the batteries in my submarine.
Again, thanks for your help
Good reliable ski mechanics are deffinetly unicorns around here... I have heard about em but never seen one.....

 

[ialonso]

If the coil is not receiving the trigger signal it won't fire. It might still be good. I would humbly suggest based on my brief experience that you are better off replacing only what you know for certain to be bad, and to test and verify the parts you think might be good to confirm they are good indeed. If bad, replace, and test the replacement comparing to the bad one, ensuring you readings make sense and the good one is good and the bad one is bad. A new part may be faulty and changing multiple things at a time without testing may result in multiple things broke anyway, (all while you think all new things are perfect, making troubleshooting a royal pain in the @$$)

Test and make sure it's broke before replacing. Change comes with risk. test all you are suspect of, within reason, as the risk outweighs the benefit (cheap to test, and confirms stuff works, and most often than not, testing allows you to get a greater understanding of how things work.)

My humble opinion, don't stop spending on my account

 

[DnE1800twin]

Somewhere in one of these threads i read about a "test plug" that plugs into the stator. Unplug the wiring from stator to mpem and plug in this "test plug". Does anyone know how to make it. I can't find the thread.

 

[Waterluvr]

The shop tool part number for the 800 engine is 295000136, not easy to find one as they obsoleted the part early 2000 something but BRP's outboard test harness is an identical harness with the same Deutsch connector ends and wiring color/locations in the plugs there's an aftermarket one on Ebay right now:
http://www.ebay.com/itm/NIB-Harness...ard-/291330361072?hash=item43d4a486f0&vxp=mtr