Sierra Marine Parts Catalog

756 I/O — MERCRUISER - Cooling System ➊ High strength synthetic cords resist shockload failure. Their low stretch propertiesassureuniformperformance over the life of the belt. ➋ The compression section is a special rubber compound that assuressmooth and even transfer of load forces to the cords. ➌ Cogsaremoldedtopreciseengineering tolerances to improve flexibility and maintain cord support. Cog geometry provides a large area for air circulation to keep the belt cool and prevent damaging heat build up in the cushion section. ➍ Rubber edges maintain positive, no-slip contact with pulley grooves for reliable energy transfer. V-BELTS BELT SIZE LISTING BY NUMBER Part No. OE # Effective Length (in.) Top Width (in.) 18-15290 57-13457, 57-13457T, 57-13457Q, 57-53215, 57-53215T 29 29/64 18-15300 57-49756 30 29/64 18-15325 57-77274A1, 57-77274 32 1/2 29/64 18-15345 57-74271T, 57-74271, 57-74271Q 34 1/2 29/64 18-15370 57-65607T, 57-65607, 57-65607Q 37 29/64 18-15380 - 38 29/64 18-15390 57-52692 39 29/64 18-15400 57-32850, 57-69143T, 57-69143Q 40 29/64 18-15405 57-76269, 57-76269Q 40 1/2 29/64 18-15410 57-49043A1,57-64032A1,57-32850,57-49043,57-64032,57-64032Q1,57-816544 41 29/64 18-15415 57-36356 41 1/2 29/64 18-15430 57-49211, 57-64416 43 29/64 Part No. OE # Effective Length (in.) Top Width (in.) 18-15435 57-64416, 57-49211 43 1/2 29/64 18-15440 57-49213A1,57-45856 44 29/64 18-15450 - 45 29/64 18-15455 - 45 1/2 29/64 18-15460 57-48120A1, 57-48120, 57-48120Q1 46 29/64 18-15470 57-78200A1, 57-78200, 57-78200Q1 47 29/64 18-15480 57-48122, 57-48122Q 48 29/64 18-15490 57-816295T, 57-816295Q 52 1/2 29/64 18-15495 57-91035A1, 57-91035Q1, 57-91035 49 1/2 29/64 18-15500 57-96834T, 57-96834Q, 57-96834, 57-13458, 57-13458Q 50 29/64 18-15520 57-33170, 57-33170Q, 57-37619T 52 29/64 18-15550 57-13458T 55 29/64 V-BELT APPLICATION HP Liter Model Years CID # Cyl Stroke Serial # Belt Type Alternator/ Water Pump Power Steering Sea Water Pump 110 110 1963-1966 153 4 4 1537370 - 2044033 V-BELT 18-15410 — — 120 120 1964-1973 153 4 4 1666601 - 3770649 V-BELT 18-15410 — — 120 120 1974-1982 153 4 4 3770650 - 6229717 V-BELT 18-15410 18-15400 (40” BELT) — 120 120 1974-1982 153 4 4 3770650 - 6229717 V-BELT 18-15410 18-15400 (40” BELT) — 120 120 1982-1986 153 4 4 6229718 - b531853 V-BELT 18-15410 (19) — — 120 120 1982-1986 153 4 4 6229718 - b531853 V-BELT 18-15400 (18) — — 120 2.5L 120 1982-89 153 4 4 6229718 - C853255 V-BELT 18-15410 — — 120 2.5L 120 (18) 1982-89 153 4 4 6229718 - C853255 V-BELT 18-15400 18-15370 — 140 140 1968-73 181 4 4 2508261-3770649 V-BELT 18-15410 — — (1) 1/2” wide (13mm) belt (2) 3/8” wide (10mm) belt (3) 28” wide (711mm) belt (4) 30” wide (762mm) belt (5) 37” wide (940mm) belt (6) 40” wide (1016mm) belt (7) 50” wide (1270mm) belt (8) 55” wide (1397mm) belt (9) Use with 5 1/2” (140mm) dia water pump pulley (10) Use with 5 7/8” (149mm) dia water pump pulley (11) Use with 7” (178mm) dia water pump pulley (12) Use with stamped steel sea water pump pulley (13) Use with cast aluminum sea water pump pulley (14) Use with plastic 4 3/4” (121mm) dia p/s pump pulley (15) Use with metal 5 3/4” (146mm) dia p/s pump pulley (16) For engine with high mounted p/s pump (17) For engines with low mounted p/s pump (18) For engine with power steering (19) For engines w/o power steering (20) For engines with closed cooling (21) For engines with standard cooling (22) Replacement kit includes 5 3/4” (146mm) pulley and longer serpentine belt (23) For engines with high mounted alternator