LEAF 2021

Prices and Supplies are subject to change without notice CUSTOMER SERVICE 1-262-763-4087 FAX 1-262-763-1920 ROTAX ® EXHAUST SYSTEMS Straight Configuration Fig. No. Part No. Description 447 UL Qty. Req’d 503 UL Qty. Req’d 582 UL Qty. Req’d 1-6 881 653 Exhaust Assortment 1 - - 1-6 881 663 Exhaust Assortment - 1 - 1-5, 8 881 631 Exhaust Assortment - - 1 1 938 795 Spring 66 MM 6 6 - 1 938 790 Spring 532/582 - - 6 2 950 141 Gasket Ring A 8x13 DIN 7603 2 2 2 3 941 615 Capstan Screw M8x1x10 2 2 2 4 979 380 Exhaust Manifold w/EGT Fitting, 447 1b* - - 4 878 937 Exhaust Manifold, 503 - 1b* - 4 973 121 Exhaust Manifold, 532/582 Length 6-5/8” w/o Hooks - - 1a* 4 973 123 Exhaust Manifold, 532/582 Length 6-5/8” w/Hooks - - 1b* 5 973 180 Connecting Elbow w/o Hooks 1a* 1a* 1a* 5 973 182 Connecting Elbow w/Hooks 1b* 1b* 1b* 6 973 191 Straight Muffer Assembly, Rotax 277 thru 503 1b* 1b* - 7 951 150 Bracket 2 2 - 8 973 192 Straight Muffler Assy Rotax 832/582 Length 35-1/2” - - 1a* 9 853 355 Hook AR AR AR 10 850 114 Exhaust Gasket (377-447) 4 - - 10 831 849 Exhaust Gasket (503) - 4 - 10 850 633 Exhaust Gasket (532/582) - - 2c* 11 945 832 Lock Washer A8 4 4 6 12 840 992 Allen Screw M8x30 4 4 6 13 F4100 Safety Wire (Diameter .032) AR AR AR AR – As required *NOTE: a - Without hooks, b - With hooks, c - See also Sl-2ST-002  E = ANTI-SEIZE  E = ANTI-SEIZE ROTAX ® SIDEMOUNT CONFIGURATION Fig. No. Part No. Description 447 UL Qty. Req’d 503 UL Qty. Req’d 582 UL Qty. Req’d 1 938 795 Spring 66 mm 6 6 - 1 938 790 Spring 532/582 - - 6 2 950 141 GasketRingA8x13DIN7603 2 2 2 3 941 615 Capstan Screw M8x1x10 2 2 2 4 979 380 Exhaust Manifold w/EGT Fitting, 447 1b* - - 4 878 937 Exhaust Manifold, 503 - 1b* - 4 973 121 Exhaust Manifold, 532/582 Length 6-5/8” w/o Hooks - - 1a* 4 973 123 Exhaust Manifold, 532/582 Length 6-5/8” w/Hooks - - 1b* 5 973 180 Connecting Elbow Assembly w/o Hooks 1a* 1a* 1a* 5 973 182 Connecting Elbow Assembly w/Hooks 1b* 1b* 1b* 6 973 198 Side Mount Muffler Assy., Rotax Engine 277 thru 503 1b* 1b* - 6 973 197 Side Mount Muffler Assy. for Rotax Engines 532/582 - - 1a* 7 853 355 Hook AR AR AR 8 NLA Exhaust Manifold Assy. - 1d* - 9 850 114 Exhaust Gasket (377/447) 4 - - 9 831 849 Exhaust Gasket (503) - 4 - 9 850 633 Exhaust Gasket (532/582) - - 2c* 10 945 832 Lock Washer A8 4 4 6 11 840 992 Allen Screw M8X30 4 4 6 12 F4100 Safety Wire (Diameter .032) AR AR AR AR – As required, NLA – No longer available *NOTE: a - Without hooks, b - With hooks, c - See also Sl-2ST-002 Rotax ® provides three exhaust systems for each of their engines: Side, Straight and Fisher. All of these systems provide equal power and tune the engine the same. • Remember, this is a pulse-tuned exhaust. The overall distance from the exhaust port to the muffler must remain the same. You can cut and reshape the muffler but the distance must remain the same because the pulse acts like an exhaust valve closing as the intake stroke is in progress. • Each muffler releases stress at the muffler/ exhaust manifold joint. This joint is held together with heavy-duty springs that attach to welded hooks. Use safety wire (P/N F4100) and a bead of high temperature silicon (P/N H4387) to prevent a broken spring from going through the propeller. • Modifying the manifolds with immediate 90º bends may reduce horsepower. • Exhaust systems should be welded with TIG or gas weld with pre-heat & post-heat procedures. 107