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Thank-you, I know that DIs have a bad rap but in my opinion they are the best of any 2-stroker. You just push button and they start whether cold or hot, they do not stink like most 2-strokes, and have lots of power. But I will admit they are the most expensive 2-stroke anyone will operate. The...

The unit in the picture is Quantum HFP-342DI. However, it is no longer sold. I have another DI which uses the better Quantum HFP-501DI. It is unibody design very similar to stock which does not have the fitting of 342DI. I would recommend the HFP-501DI as it is as direct as replacement to stock...

Morning Everyone, I wanted to share my recent experience with my Sea-doo 2001 GTX DI. My youngest drove the ski off the lake telling me it was surging and had no power. As we all know, DI can be a little finicky and they required 107 PSI Fuel Pressure, 80 PSI of Air, and Good Spark. After I...

I stand corrected by mikidymac. He is correct. Plus the pictures you put up are a 787 engine and not a 951. so please disregard my post as those directions do not apply.

No worries, thank you for the comment as I had forgotten the RFI version for that year was a 787. Later.

He says very specifically Millennium Edition. the 2000-2002 Sea-Doo GTX 951 Millennium are 947 engines. If you he had stated 2000 Sea-doo RFI, you would be correct. That is a 787. But the title is "2000 seadoo bomba millenium edition Rotax Fuel injection" which means 947 DI.

All of the 2000-2002 Sea-Doo GTX 951 Millennium (Rotax 947) are 951 engines. I did find the product numbers showing both carb and DI versions. Since he did not specify carb model or show pictures. I am assuming the 915 DI engine.

OK first thing disregard RAVE valve comments as they only apply when throttle is 70% or greater. A rave valve not rising reduces the top RPM of the engine but does not hamper low end as you are describing especially out of water. Since you have a DI, this add two component which need to be...

Hey Ken, I have replaced every oil tank all three of my skis. All have been GTX hulls. This is a rather easy job and more than within your skill level. First get the special tools for the bottom exhaust bolt. Ebay is your friend. While it is possible to get at it with regular wrench, save...

Burt, This ski has 951 DI engine and not a 787. It does not have a rotary valve. The 951 DI uses two Rave valves on in the inlet and fuel injection.

Short Answer is NO. DI operated different than Carb models. If your unit does have over 200 hours, It is time for a rebuild anyways. This would include boring the cylinder, new or rebuild crankshaft, and new/rebuilt counter balance shaft. Now as to your issue, I think the most simple answer is...

I have purchased and rebuilt 3 GTX DI to this date. Mostly for my family but one for a friend. Every DI I have ever seen has a leaky oil tank. As such, I always assume the oil tank is going to leak. I have seen videos of others only filling the oil tank to about 1/3 to keep the spills to limit...

I would drain the oil if you are not sure the correct type and change the oil filter. The DI require XPS Full Synthetic oil. These DIs are extreme high performance. Side Note: when you are putting back together, please be sure to do the engine leak down test. This is the only way to know if the...

MTEC, you bring up a really good point which did not think of in my original post. The majority of the oil is located in a spot below the fill point. The counterbalance is in the way. The shape of the void where the oil lives is not like an oil pan. As such the majority of oil is in multiple...

I second this person's comment.

I would say your desire to check the oil is not warranted. The 951 DI engine is supposed to have major overhaul every 300 or so hours. The 30W oil which is placed in the counterbalance is more than enough to lubricate until major service. The only reason which Sea-doo recommends changing or even...