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Type: Posts; User: smokeysevin

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  1. Replies
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    12f and 15f pistons use the same wrist pin...

    12f and 15f pistons use the same wrist pin height, its the same as the zx12r.

    The cylinders (12f and 15f) are the same height

    The 12f rods are longer and thinner.

    55.4mm stroke vs 69.2mm...
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    Je 9.8:1 zx12r pistons are pump gas safe and...

    Je 9.8:1 zx12r pistons are pump gas safe and right around 12:1in the 15f motor, that plus zx12r cams and some porting will put you right around 200hp. I ran that setup and it ran 70 with a shitty...
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    On almost every ski I have had the misfortune of...

    On almost every ski I have had the misfortune of trying to rescue from salt, the exhaust is corroded to hell too.

    As far a reasons why in your case, different alloys of aluminum, different paint...
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    Sticky: The gps is correct, the paddle wheel is off. My...

    The gps is correct, the paddle wheel is off. My 12f routinely read 70mph.

    Sean
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    You run into cam timing issues and timing chain...

    You run into cam timing issues and timing chain length issues with base spacers.

    200hp is doable with higher comp pistons and bigger cams in na form.

    Sean
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    Rods are the same on everything except the 12f,...

    Rods are the same on everything except the 12f, deck height I couldn't tell you. There is a thread in the tech tips and info section that has some of it.

    On the old riva boats, they used to run...
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    Waz is correct, I have some seadoo motors in my...

    Waz is correct, I have some seadoo motors in my garage right now doing the same thing. it 100% comes down to not rinsing properly and not drying out the hull enough.

    If you store them with...
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    I am currently in the process of building a 15f...

    I am currently in the process of building a 15f motor for boost, not to shit on your plans but almost none of what you are saying will work.

    The deck height of the 15f cylinders is different from...
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    Pull the harness and check all the connections...

    Pull the harness and check all the connections including the big block plugs.

    Sean
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    Seadoo XP waterbox dimensions

    If anyone has one of the purple waterboxes from a mid 90s xp ( I am looking at a 587 twin box to swap into my standup), can you measure it for me and get me the approximate dimensions?

    I need...
  11. Hood Repair and Wax Racing Goodies 1 (Wax on in...

    Hood Repair and Wax Racing Goodies 1 (Wax on in the hood brah)

    Not a whole lot to report but I am getting back to working on the ski. My wax racing parts came in after the corona delays and they...
  12. There is a stainless insert inside the corroded...

    There is a stainless insert inside the corroded aluminum ring that you could pop out and measure to cut a solid aluminum part as a replacement for the whole end assembly.

    Alternatively, you could...
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    I think part of what makes it so surprising is...

    I think part of what makes it so surprising is that the run looked almost effortless and other than the hugeass turbo, the ski looked mostly stock at least to a dirty kawi guy.

    I don't know enough...
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    https://en.wikipedia.org/wiki/BMW_M12 "For...

    https://en.wikipedia.org/wiki/BMW_M12

    "For 1986, the M12 was upgraded into the M12/13/1. This version was claimed to have produced a maximum output of 1,400 hp (1,044 kW) in qualifying trim,...
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    Please put a bar pad on the steering stem, not...

    Please put a bar pad on the steering stem, not running one is a quick way to eat your teeth.

    As far as fuel gauge, I installed a hardin marine autocal sending unit and ran an autometer gauge on...
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    I would love more details on what was used for...

    I would love more details on what was used for sefety equipment. 80+ is enough to get hurt real bad if something goes wrong, 135 without a chute is probably a death sentence.

    Sean
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    Check the big terminal block connections, they...

    Check the big terminal block connections, they look like big square electrical connectors with plugs on them.

    There are brown, light grey, dark grey, and black ones.

    Sean
  18. Have you checked the terminal block connectors...

    Have you checked the terminal block connectors for signs of corrosion? Specifically the dark grey ones with the bundles of black wires?

    I don't remember if the stock ecu is a ground switched or...
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    You may have gotten lucky then. Just keep an eye...

    You may have gotten lucky then. Just keep an eye on it, milkshakes are no bueno for motors.

    Sean
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    Bilge water mixing with the oil in the "open...

    Bilge water mixing with the oil in the "open concept oil pan" is what I would guess. Its probably worth flushing the oil system a few times to make sure you get all the contaminates out of the...
  21. I don't recall seeing the cranking advance but...

    I don't recall seeing the cranking advance but its been a while since I messed with it and I didn't have a full mask for the map file so I may not have that function defined.

    As for my standalone...
  22. That is what I did on my na 15f build. It made a...

    That is what I did on my na 15f build. It made a huge difference.

    Sean
  23. To elaborate, I also compated the tune file from...

    To elaborate, I also compated the tune file from ecu 1 with one from a known good riva ecu I had saved previously and it matched, the good file was flashed to a new oe ecu and checked again...
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    Check the fuel pressure. If the pump was bad,...

    Check the fuel pressure. If the pump was bad, odds are the regulator is also bad.

    As for spark, if you swap the coils from 1 and 4 to 2 and 3 (both the spark plug side and the harness side of the...
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    I have started putting a slight smear of...

    I have started putting a slight smear of dielectric grease on the contact points between the starter and block and where the ground connection mounts to the starter. Can't comment long term but after...
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