This Seloc DIY repair and service manual, covers all models of Polaris personal watercraft, including:
Book Excerpt: 1992-1997 Polaris Personal Watercraft Repair Manual - All Models
- Polaris SL650, 1992
- Polaris SL650, SL750, 1993
- Polaris SL650, SL750, SLT750, 1994
- Polaris SL650, SL650-STD, SL750, SLT750, SLX780, 1995
- Polaris SL700, SLT700, Hurricane, SL780, SLT780, SLX780, SL900, SLTX, 1996
- Polaris SL700, SL700 Deluxe, SLT700, Hurricane, SL780, SLT780, SL900, SL1050, SLTX, 1997
EASY CHECK FOR TWISTED CRANKSHAFT
FUEL SYSTEM PROBLEMS
A twisted crankshaft may be detected by first removing the spark plugs and setting up a dial indicator in one of the spark plug openings. If a dial indicator is not available, a pencil, straw, or other small diameter straight object may be used.
With the indicator, or other device, in place, determine the TDC (top dead center) of the No. 1 piston. Now, make two matching marks - one on the flywheel and the other adjacent on the strator.
Next, rotate the flywheel EXACTLY 180 degrees -- preferably using a degree wheel on the flywheel. Make a second mark on the stator adjacent to the mark on the flywheel.
Now, check for TDC of the other piston/s. The dial indicator should indicate the same reading as for the first piston AND the two marks on the stator should be EXACTLY opposite each other through the center of the crankshaft.
If the indicator is off or if the marks on the stator are not aligned, as described -- the crankshaft is twisted and MUST be replaced.
The following paragraphs provide an orderly sequence of tests to pinpoint problems in the system. It is very rare for the carburetor by itself to cause failure of the engine to start.
Many times fuel system troubles are caused by a plugged fuel filter, a defective fuel pump, or by a leak in the fuel line from the fuel tank to the fuel pump or by a vacuum leak in the line between the pump and the crankcase.
Fuel will begin to sour in three to four months and will cause engine starting problems. A fuel additive such as Sta-Bil may be used to prevent gum from forming during storage or prolonged idle periods.
When the engine is hot, the fuel system can cause starting problems. After a hot engine is shut down, the temperature inside the fuel chamber may rise to 200 degrees F and cause the fuel to actually boil.
All carburetors are vented to allow this pressure to escape to the atmosphere. However, some of the fuel may percolate over the high-speed nozzle and overflow into the intake manifold.
Subject: 1992, 1993, 1994, 1995, 1996, 1997 Polaris personal watercraft repair and service. ISBN-10: 0893300454 | ISBN-13: 9780893300456 | Seloc 9400