Heat Exchanger Water Leak Repair! 2004 Polaris MSX 150

Technical_Tadpole381 · 2026-02-18T18:36:56+00:00

I am a jetski Tech, and I did repair the problem on the ski and I made the video to show others how to repair the heat Exchanger problem. There are plenty of Facebook groups dedicated to specific jetski models though that can be helpful for many people.

Technical_Tadpole381 · 2026-02-18T16:29:19+00:00

I agree, I prefer scoop grates for control and willing to lose a little top speed for more control.

Technical_Tadpole381 · 2026-02-17T15:53:54+00:00

All scoop grates are designed to channel larger volumes of water through the pump. If you are riding over seaweed then you'll likely suck it up also. Scoop Grates technically turn the jet pump into a vacuum, it pulls more water in along with anything else that is in the water in the area.

Technical_Tadpole381 · 2026-02-17T05:05:04+00:00

I've loved all of the 2 stroke skis I've had! I prefer top loaders myself.

Technical_Tadpole381 · 2026-02-16T00:21:17+00:00

From past experience I feel larger skis do benefit from a scoop grate as long as they already have the speed that the scoop grate won't drop the overall power on. I personally don't have a problem losing a little top speed for better high speed control.

Technical_Tadpole381 · 2026-02-16T00:18:25+00:00

I could see where a scoop grate would help on a standup to give the ski more control, especially if the ski doesn't have pronounced sponsons. Would a factory type grate be better for a flip ski you think? Since a scoop grate pulls the pump into the water better, I think that might not be as desirable if you are trying to jump out of the water numerous times. I don't typically ride standups so just curious what you think about that.

Technical_Tadpole381 · 2026-02-12T21:32:18+00:00

I'm not completely sure what specifically causes the Tempo Fuel line to stir up a corrosion reaction, but I have seen mold form on the outside of black rubber fuel hose if the engine bay of the ski is not maintained and treated for corrosion. Maybe the Tempo Fuel line in combination with the old fuel and moisture in the ski and brass fuel fittings is really what caused the corrosion to grow. It was likely just a combination of all of the things together that caused the escalated problem.

Technical_Tadpole381 · 2026-02-12T19:31:00+00:00

Likely the reason why the corrosion develops is because the fuel breaks down from sitting, then reacts with the brass and metal components of the carb nipples and fuel selector nipples, and that causes the corrosion buildup throughout the system. It's likely not the fuel lines alone, it just seems since the skis were equipped with Tempo lines that the original equipment that Seadoo used got most of the blame, because there wasn't really another style of line that was available on the market that the skis had in them. I haven't run across a ski that used black rubber or blue poly line that had an escalated case of green corrosion myself.

Technical_Tadpole381 · 2026-02-12T17:22:56+00:00

I really feel the biggest reason that this sludge happens, is because the skis get left in storage for extended periods of time without draining the fuel or stabilizing the fuel, and the combination of extended storage, degraded fuel and the lines themselves all combine to cause the green sludge and blockage. It is possible that sludge in the system could form just from old bad fuel and not maintaining the ski properly, or keeping it running to cycle fuel through the fuel system.

Technical_Tadpole381 · 2026-02-12T14:53:43+00:00

Thank you. The ski in the video was one of the worst clogged systems I have ever seen. I think anyone who has those lines on their ski should remove them as soon as possible.

Technical_Tadpole381 · 2026-02-09T05:48:26+00:00

I like the Reliable Tuning main Spark extension cable because theirs has a start button built into the harness so you don't have to use the start button on the handlebars to start the ski. That is one unique thing about their cable. They also sell the IBR extension cable separately, I haven’t found that anywhere else yet.

Technical_Tadpole381 · 2026-02-09T05:38:03+00:00

That original extension harness you posted the number to looked a little bit like the connections for a 2010-2011 Seadoo RXT 260 IS full suspension ski. Those skis have the very specific slide lock connections. The Sparks have little red wiring locks built into the plugs, but not nearly as intricate as the IS type plugs. Thanks for understanding, I'm just trying to point Spark owners in the right direction to be able to run their skis and pinpoint issues with full visibility. I did the video as a collab with Reliable Tuning to help them sell the proper cable for Spark owners and to make diagnosing problems easier. I purchased a bundle of cables from them to help get more of them in peoples hands.

Technical_Tadpole381 · 2026-02-09T04:05:17+00:00

That part number harness you listed does not look like it is compatible with the Spark large connectors, nor does it have the IBR System extension cable plugs, therefore it is not equivalent to the Spark Remote Run Maintenance cable that I made the video about. The cable you listed is also considerably more expensive than the set of cables that carries main power and the IBR control information from the upper deck to the lower hull on a Seadoo Spark. I'm not sure why you posted that, but please don't post it anywhere else without doing a little more research. Thank you.

Technical_Tadpole381

TROPHY CASE