Thread: Tip of the day: Engine Alignment
11-11-2006, 03:06 PM #1
Tip of the day: Engine Alignment
I recently purchased the Sea Doo engine alignment tool.
Its very simple to use. First you must remove your driveshaft and drive shaft seal boot. Then install the mounting plate on the pump shoe and insert the adaptor into the end of the crankshaft. Then you just simply slide the alignment rod thru and see how it makes contact with the adaptor fitting. It should slide all the way in with just finger pressure pushing the shaft thru. If it doesn't then you shim at the corresponding 3 motor mounts as necessary.
11-11-2006, 03:10 PM #2
Ever wonder why some skis are slower than others with the same mods? One reason can be a misaligned pump shoe. As you guys know i have been having problems with mine and the alignment is off big time. Look at the picture of the alignment shaft coming thru the thru hull fitting. Its easy to see its not centered. When running a straght edge across the back of the ski and then measuring from the pump shoe to the straight edge my pump shoe is off 1/8" left to right. 1/8" doesn't sound like much, but that is tremendous. This means the water is not exiting the pump nozzle square with the back of the ski, its leaving at an angle. This is costing a lot of speed!
11-11-2006, 03:18 PM #3
With a driveshaft not being centered in the thru hull fitting your accordion boot will wobble causing lots of cavitation out of the hole (which i had). If its cavitating out of the hole its cavitating all the way up costing speed.
Always wondered why JD 1 ran 85+ with no NOS and the best i ever got was 82.9 with the exact same mods
Now i know!!!
11-11-2006, 03:31 PM #4
This is excellent information for the more heavily modified ski's and the mildly modded ones as well as the ones that might be dealing with constant wear ring problems...This tool is a MUST and takes no time to learn how to use...
11-11-2006, 03:37 PM #5
Yea, the tool is a must, but DAMN it's expensive
11-11-2006, 03:58 PM #6
HA! funny u type this... i just got finished timing the motor for my RXP (which was timed on the wrong cylinder initially, good thing i checked it, or tick tick tick bye bye valves ) ... put the engine in with rotax racing motor mount.. and felt like checking the alignment with the same tools...oh man my alignment was off in every which direction, left/right and up/down .... straight as balls now
11-11-2006, 04:48 PM #7
Jerry, would you consider a tool rental program? I would pay to rent your allignment tool. Maybe enough of us would so that you could recoup the outrageous price of the tool. If you do, I call shotgun
11-11-2006, 04:54 PM #8
So would this be worth checking on a brand new ski? If so do you think you would rent the tool Jerry? Say $50 plus shipping for a week?
11-11-2006, 04:56 PM #9
Rent idea sounds like a good one. My motor has never came out and I have no cav. problems. Good Idea to check it anyway?
11-11-2006, 04:57 PM #10
and the drive shaft will eat those carbon seals too
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