Go ahead and try if you want, it's your ski/engine. Might read this first. Copied from a Sea Doo bulletin.
From SeaDoo TSB
The engines updated in 2002 were called the DI LE. However, some international Yrs 2002's
produced did not have the new LE engine version in them. Refer to the 2002 Technical
Update Book, Section 3: "What's New" (P/N 219 700 170) for this information and all the
details concerning the differences between the two engines.
Note that the 2003 blue book rebuilt part numbers are incorrect for cylinders and short blocks.
The correct numbers are:
DI
• Rebuilt cylinders: 421 000 570
• Rebuilt short block: 421 000 572
DI LE
• Rebuilt cylinder: 421 000 205
• Rebuilt short block: 421 000 416
The main difference between these cylinders are:
• DI cylinders have 6 ports, DI LE cylinders have 5 ports
• the volumetric efficiency is increased and the fuel mapping is different on DI LE engines
Interchanging cylinders would have an adverse effect in the way the engine performs.
It is important to note that although the air injectors would both physically fit on either of the
engines types; it is not a good idea to interchange them. The opening and closing times on
the DI LE injectors are different because of their ability to react. The injecting mapping is
different, and if used on DI engines they will run richer. This could foul plugs and could also
cause non-compliance with the EPA.
DI DI
Here is some more info:
DI ENGINE REVIEWsdd2008-002-052
The 947 DI engine was first introduced in YR 2000.The engine remained the same until YR 2002 when we introduced the LE (Low Emissions) engine. This engine provided lower emissions, improved fuel economy, better throttle response and met EPA2006 and CARB 2004 requirement. It also allowed the use of 87 octane fuel.The Major differences were:– Improved cylinder combustion chamber design(new head)– 6 ports vs 5 ports cylinders– Different direct injectors.NOTE: There are also casting numbers stamped on the outside of the cylinders to identify standard VSLE.STANDARD LE6 923 710 6 613 570Other parts that were not interchangeable were:– Pistons– The fuel rail and top clamps– MAP sensor and ECM– Jet Pump housing and pump support.
NOTE: Check the PARTS CATALOG if unsure of other parts.These parts can not be interchanged between engines. Depending on the incorrect part installed, severe engine damage may result, but also a just a performance drop may be experienced. Several aftermarket companies are offering engine components for DI's. If you have a performance issue with a DI and you have done the basic troubleshooting, ensure that all the correct parts are installed on it. It must be noted that not ALL YR 2002 DI models received the LE engine, some International RX DI's received the old version. The 2002 TECHNICAL UPDATE BOOK (P/N 219 700 170) which is still available today goes into more details of all the changes that were made and what models received the LE engine.
