Polaris Virage TX 2000 Service Manual

Dial Indicator
Degree
Wheel
ENGINE
Crankshaft Indexing
Crankshaft Indexing - SLX / Pro 1200 / Virage TX / Genesis
Polaris Watercraft crankshafts are pressed together or
"indexed" so the connecting rod journal center lines are
120° apart from each other.
It is sometimes necessary to check multi-cylinder crank
shafts to verify that one cylinder has not been forced out
of position relative to the other cylinder or cylinders.
Causes for out-of-index crankshafts include but are not
not limited to:
• Hydrolock from water or fuel; See Troubleshoot
ing, Chapter 2.
• Impact to impeller from foreign object or acci
dent;
• Abrupt piston or other mechanical failure;
Following is a method of checking:
Disconnect battery ground cable and all spark plug high
tension leads; ground high tension leads to engine. Dis
connect lanyard from engine stop switch before proceed
ing with the following steps.
1 . Securely fasten a degree wheel on the flywheel or
output coupler/driveshaft. Use a large degree wheel
for more accuracy, and make sure it is mounted
concentrically with the crankshaft center line. Cut a
slot in a paper or cardboard degree wheel and slide it
over the driveshaft if engine and pump shaft is
installed in craft. Again, be sure to secure the degree
wheel.
2 . Sharpen a coat hanger or section of welding rod and
anchor it to a convenient spot. Point the sharpened
end at the outer perimeter of the flywheel or drive
coupler mounted degree wheel.
3 . Install a dial indicator into the magneto end cylinder
spark plug hole (front) (#1). (The ignition timing is
referenced by the magneto end.)
4. Rotate the engine to bring the piston to top dead
center (TDC) on the cylinder with the indicator
installed.
5 . Locate TDC as accurately as possible by finding the
center of the point where there is no piston
movement. "Zero" the dial indicator at this point.
Continue to rotate the crankshaft in the normal
direction of rotation (counter clockwise as viewed
from the rear of the craft) until the dial indicator reads
.100" (2.54mm) after top dead center (ATDC).
IMPORTANT: Do not allow the crankshaft to move
from this position.
6 . Bend the pointer or move the degree wheel until the
pointer aligns with the 120° mark on the degree
wheel.
.100 ATDC
Three Cylinder
3100
4.50
Polaris Sales Inc.

Polaris Virage TX 2000 Specifications

General

Brand	Polaris
Model	Virage TX 2000
Category	Boat
Language	English