On the exhaust I saw a "cap" same as the ones on the carbs. What is it?
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I think I figured it out: it is the generator for charging the battery.
If you mean the rear "e-box", it's the box that houses the two ignition coils and the starter solenoid, along with the main system fuse.
It has a lid on top held by three prongs and a rubber gasket around the lid lip to seal and keep water out.
It's shown here in the electrical schematic on the right side, called "Rear Electrical Box":
Thanks! I am an electronics designer/consultant. You are talking my language!
Okay, in that case the alternator you're looking for is under the front cover(magneto cover) of the engine, it's a multi pole winding wired in three phase "Y" as you can see in the upper right corner of the schematic with a rotating permanent magnet on the flywheel. The rectifier/voltage regulator is integrated into the MPEM and is three diodes in series with three SCR's triggered by a rather standard couple of PNP transistors + zener combination something like this(but slightly more sophisticated) all sealed and potted in the MPEM:
There are three or four grounds inside that rear e-box all tied together by a screw threaded into a plastic post, this looks kind of cheesy to me and could become an issue at some point. I have a plan to drill the post straight through the bottom of the e-box and install a corrosion proof screw with nut and washer(s) to make it more reliable.
Is the VTS mechanically controlling the jet nozzle up and down to adjust how high the bow will be raised?
I saw a VTS motor in the diagram. Just wondering.
Yep,, that's correct...
My boat doesn't have VTS, I don't think your does either? That schematic diagram is for the XP ski, it does have VTS. It's almost the same otherwise, I don't know of any other differences.
I can remove the carbs in about 10 minutes, they are easy to remove. I climb into the bilge to remove the throttle cable and fuel line from the carburetor fuel pump, the rest I can remove by leaning over the rear seat. No other disassembly required.
Be careful removing the fuel return line, the fitting is plastic and looks easy to break off.
it's made specially to strain 2 stroke oil, it's not a standard fuel filter.
Because of this reason. Is it possible the PO changed the filter to let 2 stroke go through?
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Thanks. Otherwise I will be very disappointed tonight by finding out my VTS is gone. :-D
Are the carbs underneath the big exhaust port?
I searched and searched around Internet, just could not find a clear view showing where are the carbs. (I thought the RAVE valves are until you told me)
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Other possible electrical differences (ski vs boat):
We also have a neutral start interlock switch in the reverse/neutral/forward shifter, I don't see this one on the 951 XP-ski schematic, maybe I overlooked it. The starter won't crank motor unless the shifter is in neutral position(no beeps!). Does your beeper work (chirp, chirp)?
This little filter strainer is an inline type in the delivery tube from the oil tank. I circled this tube(but not the filter) in your photo, the filter is just a few inches down from the red circle, can't be seen in the photo. It's a special filter, low restriction oil strainer type, so if you replace it then be sure to get the right one or the oil flow will be restricted.
The carbs are located on the port side of the motor, just under the black exhaust manifold. There is a black plastic air silencer box over them that clips on with a single stainless clip at the top, pull the clip and the air box pulls off the reveal the carburetor intakes..