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Old 12-10-2013, 12:14 PM   #1
Senior Member
Join Date: Apr 2010
Location: Bryan, Texas
Posts: 243
Default After-market o-rings that fit Rotax 912 engines.

Info provided by Jerrytex.

This is a list of o-rings for a 912 UL that I compiled when putting my 912 back together from it's partially disassembled state when I got it. These are NOT all the o-rings in the engine but it is the majority needed and the ones that are the hardest to get to when the engine is assembled. If other o-rings are needed, I attached links to the parts pages and a link to Maryland Metrics so you could find the one needed, cross reference it to Maryland Metric's part number and order it. Like I mentioned earlier, you will have to triple or quadruple your order to get to their minimum order amount. These are NOT rotax parts, but they worked in my engine and thus far, no leaks.

Quantity p/n size brand name description Location Rotax #

> 4 R398-20744 34x2 N/A O-ring Intake to Head 230-910
> 4 R398-20660 19x2 N/A O-ring Coolant socket flange 950-180
> 2 R398-20559 5x1.5 N/A O-ring Starter bolts 950-420
> 1 R398-20736 32x2 N/A O-ring Water pump 90 230-020
> 1 R398-20724 30x2.5 N/A O-ring oil pump 950-410
> 2 R398-17597 11x2.7 N/A O-ring oil pump 250-460
> 1 R398-20849 57x3 N/A O-ring oil pump 430-405
> 1 R398-32557 24.4x3.1 N/A O-ring starter to block 250-140
> 2 R398-20811 47x2 N/A O-Ring Carb Socket to intake 230-300

Made from Viton

Link to Lockwood to find the o-rings. The size is in the description.

Link to Maryland Metrics. Find the size and their part number.
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