ALL PISTONS ARE SUPPLIED COMPLETE WITH PISTON RINGS, WRIST PIN AND CIRCLIPS. MARINER (JAPANESE MODELS) Model / HP 9.9 / 15 48 Cyl. 2 2 Bore Size std std Sierra Piston Kit Contents (See Application Charts for Specific Applications) Piston 18-4135 18-4138 OEM Part # 761-7982M, 761-7982T, 761-7134M, 761-7133M, 761-7131M 761-8484M, 761-7198M, 761-7197M, 761-7196M .25mm O.S. O.E. # 18-3977 Model 9.9 15C 30A 20C, 25A 25C 28 48 W48 60 Ser# Code 682 684 689 6A9 695 664 670 670 675 39-18939M, 39-18939T Ser # ALL ALL ALL ALL ALL ALL .25mm O.S. O.E. # 18-3986 39-81096M S-02441 & Up / L33132 & UP M 002731 & Up / ML 314101 & Up E 00101-001170 / EL 30101-304180 18-4135 18-4135 18-4138 — — — — — — .25mm Piston — — — — — — — — — .25mm O.S. O.E. # 18-3992 .50mm Piston — — — — — — — — — Piston Ring 18-3976 — MARINER PISTON RINGS - JAPANESE MODELS 39-83196M Standard Rings 18-3976 18-3976 — — — — — — — .50mm O.S. O.E. # 18-3978 MARINER PISTON AND RINGS APPLICATION - JAPANESE MODELS Standard Piston .25mm Rings 18-3977 18-3977 — 18-3986 18-3986 18-3986 18-3992 18-3992 18-3992 Model / HP 35-140 35-140 35-140 35-140 35-140 35-140 35-140 35-140 35-140 35-140 35-140 35-140 40-50 40-50 40-50 50-60 50-60 50-60 70-115 70-115 70-115 75-125 75-125 75-125 HP 3.5 Cyl. 2 - 6 2 - 6 2 - 6 2 - 6 2 - 6 2 - 6 2 - 6 2 - 6 2 - 6 2 - 6 2 - 6 2 - 6 4 4 4 3 3 3 3-4 3-4 3-4 3-4 3-4 3-4 Cyl. 1 Bore Size Piston 2.875 / Std. — 2.890 / .015 2.905 / .030 2.875 / Std. — 2.890 / .015 2.905 / .030 2.875 / Std. 2.890 / .015 2.905 / .030 Sierra Piston Kit Contents (See Application Charts for Specific Applications) OEM Part # MERCURY / MARINER Piston Ring OEM Part # 18-4535 774-9137A12 774-9137A13 774-9137A14 18-4515 774-9137A9 774-9137A10 774-9137A11 18-4535 2.875 / Std. — 2.890 / .015 2.905 / .030 2.565 / Std. 2.580 / .015 2.595 / .030 776-8896A3 776-8897A2 776-8898A2 18-4156 18-4620 18-4621 18-4622 2.875 / Std. — 2.890 / .015 2.905 / .030 3.375 / Std. 3.390 / .015 3.405 / .030 3.500 / Std. 3.515 / .015 3.530 / .030 18-4017 18-4018 18-4623 18-4624 18-4625 18-4626 18-4627 18-4628 Beginning Serial No. 6202173 776-8600A9 776-9095A1 776-9096A1 780-9229A7, 743-5172A6, 743-3193A4, 743-3193A2 780-9229A10, 743-3366A2, 743-3366A1 780-9229A11, 743-7716A2 783-9613A1 783-9613A2, 783-9613T2 783-9613A3, 783-9613T3 777-815965T4, 777-815965A4 777-815965A5 777-815965A6 2 RING PISTONS - HIGH DOME 18-3918 18-3919 18-3920 2 RING PISTONS - LOW DOME 18-3918 18-3919 18-3920 3 RING PISTONS - HIGH DOME ➀ 18-3902 18-3916 ➀18-3917 3 RING PISTONS - LOW DOME ➁18-3902 ➁18-3916 18-3917 2 RING PISTONS - CROSSFLOW 18-3966 18-3967 18-3968 18-4019 18-4020 18-4021 18-3979 — 18-3981 2704-826191T4, 2704-826191A4, 2704-826191A6, 2704-821896A6, 2704-812896A2 2704-821896A3 2704-821896A4 Ending Serial No. & UP Std. Cyl. Dia. (Bore) 18-3982 — 18-3984 39-78816A12 39-78811A12, 39-45204A12 39-88392A12, 39-88392 39-18653A12 39-18653A1 39-18653A2 39-19721A6 39-19721A1 39-19721A2 39-96170A12 39-96170A3 39-96170A4 39-822321A12, 39-824905A12 39-822321A1 39-822321A2 3 RING PISTON AND RINGS APPLICATION (REFERENCE ONLY ➂) Std. Piston .015 O.S. Piston 2 — ➀ 3 ring high dome NLA, 2 ring piston are now substituted — .030 O.S. Piston — APPLICATION CONTINUED ON NEXT PAGE ➂ Chart is for referencing only, pistons received will be 2 ring version ➃ Priced per package of 2. ➁ 3 ring low dome NLA, 2 ring piston are now substituted 671 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ Std. Rings 40-52035 40-52035 40-52035 40-52035 40-52035 40-52035 40-52035 40-52035 40-52035 40-52035 40-52035 40-52035 40-52035 40-52035 40-52035 .015 O.S. Rings — .030 O.S. Rings — 39-78816A12, 39-45155A12 39-78811A12, 39-45204A12 39-88392A12, 39-88392 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ 40-52035 40-52035 40-52035 39-817096A6 39-817096A16 39-817096A26 39-817096A6 39-817096A16 39-817096A26 Circlips 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ 18-4294-9 ➃ OEM Part # 40-52035 40-52035 40-52035 40-52035 40-52035 40-52035 39-15322M .50mm Rings 18-3978 18-3978 — — — — — — — Qty. Req’d 2 2 2 2 2 2 2 2 2 OEM Part # 39-15320M, 39-15320T — OUTBOARD — MERCURY/MARINER - Internal Engine System
20220712
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