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Parts Inventories from overstocked or closing Sea Doo shops. If you have parts or know of a Sea Doo dealer in your area that is closing, contact me at OSDparts.com with the details.
ALSO WANTED |
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OSDparts Items
 Complete Carb Rebuild Kits For Sea Doo Hard to read?  Check out this Gauge repair kit! 1995-up Sea Doo?  NEW Button Kit Is now available!  Fits Most 2 Stroke Carb Sea Doos 1995-1997 Sportster MPEM Conversion 1995 Speedster MPEM Conversion 1996 Speedster MPEM Conversion 1997 Speedster MPEM Conversion 1997 Challenger MPEM Conversion
Complete Pump Housing Kits! |
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New Parts (OSD)
Accessories & More
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Technical Info
787/947 CB Reservoir Oil
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Sea Doo Tips
electrical system damage NEVER jump start your ski with a running vehicle!!
Change your pump oil
Battery dying in your Trim
Every time you have
Save money and time
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| The area above is always changing so check back often as links are added. |
787 & 947 Counterbalance Oil CheckThe 787 and 947 engines have a counterbalance oil reservoir that the oem Sea Doo manual says needs to be checked every 50 hours. The 787 though has what I consider a poor design since there is no seal between the crank main bearing next to the cylinder and the crank counterbalance gear. Only a Labyrinth washer separates the counterbalance reservoir from the rear of the crankcase. In a short time after any oil is added, oil in the counterbalance area on a 787 will dissipate. I personally add oil whenever convenient to the reservoir to prolong gear and bearing life. Is it necessary? I'm sure people debate that but I know from my Mechanical Engineering background that meshing gears and bearings will last much longer in gear lube vs gas with a little oil in it. So add some oil if you happen to have access to the plug (if yours has one) but I wouldn't go to the trouble of taking things apart just for that. Also note that if you get water in the crankcase of a 787, it will also get into the counterbalance reservoir so you would need to remove the drain plug under the reservoir and get the water out. If not, your engine won't be around for long! (see the last picture below) As for the 947 (951), the manual doesn't tell you how to check the counterbalance oil or how high the oil should be, but when I get that info, I'll add it! Below you can see what plug or fitting needs to be removed to add oil to the reservoir.
The manual states the 787 & 787 RFI should have 30 mL (1 oz) SAE 30 motor oil in the reservoir.
In my opinion, on the 947 (951) just adding oil especially to low/old oil seems like a bad fix. The oil not only should be checked, but should be changed maybe every 200 hours. If you have your engine out, you might consider adding a fitting to the lowest point of the reservoir so oil can be drained.
787/787 RFI
947 Carb
947 DI
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