03-42
SECTION 03 - ENGINE PREPARATION
NOTE:
Be sure to install labyrinth sleeve with its
hollow side facing PTO side outer bearing.
1. PTO side outer bearing
2. Hollow side
Slide on outer bearing until it touches sleeve.
Install bearings so that their peripherical grooves
will be located as shown in the following illustra-
tion.
1. Peripherical grooves on inner side (if applicable)
2. Peripherical grooves on inner side
NOTE:
Not all engines are equipped with the lab-
yrinth sleeve between the PTO crankshaft bear-
ings. For racing purposes, it would be advantageous
for engines with dual carburetors to have the laby-
rinth sleeve installed (except the 787 and 947 en-
gines) to help displace crankcase volume, thus
increasing primary compression.
ENGINE BREAK-IN PROCEDURE
When preparing an engine for racing, many de-
tails must be made exactly to specification to
achieve the maximum performance.
To obtain the most benefit from your labor and
money, a proper break-in is essential.
The proper break-in procedure allows all of the
“rough” metallic surfaces to slowly begin to “fit”
each other resulting in minimum friction loss and
maximum power output.
The importance of this procedure should not be
underestimated.
With Bombardier-Rotax watercraft engines, a
break-in period is required before operating the
engine at full throttle. Engine manufacturer rec-
ommendation is about 10 operating hours.
During this period, maximum throttle should not
exceed 3/4, however, brief full acceleration and
speed variations contribute to a good break-in.
Continued wide open throttle accelerations, pro-
longed cruising speeds and overloading the en-
gine are detrimental during the break-in period.
To assure additional protection during the initial
engine break-in, 250 mL of SEA-DOO INJECTION
OIL should be added in the fuel tank for the first
full fuel tank filling only.
NOTE:
Replace spark plugs after engine break-in.
RECOMMENDED OIL
All Sea-Doo watercraft can use BOMBARDIER
ROTAX INJECTION OIL (P/N 413 802 900 – 1 L or
413 803 000 – 4 L) which is available from autho-
rized dealers. It is a blend of specially selected
base oils and additives which provides outstand-
ing lubrication, engine cleanliness and minimum
spark plug fouling.
For the ultimate engine protection, BOMBARDIER
ROTAX Formula XP-S (P/N 413 710 500 – 1 L or
413 711 000 – 4 L) can also be used. This fully syn-
thetic oil provide outstanding cleanliness, less
friction and wear for greater engine performance
and durability.
NOTE:
High quality low ash API TC injection oil for
2-cycle engines can be used if BOMBARDIER
ROTAX INJECTION OIL is not available.
F01D4VA
1
2
F01D1ZA
2
1
-
CAUTION
Never use 4-cycle motor oil and never mix
with outboard oil. Do not use NMMA TC-W,
TC-W2 or TC-W3 outboard oils or other ash-
less type 2-cycle oils. Avoid mixing different
brands of API TC oil as resulting chemical re-
action may cause severe engine damage.
Summary of Contents for Bombardier
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