If you have a plastic Power Steering Pulley, you need to read the information below.
Models
All V6 and V8 Sterndrive Engines with a Serpentine Belt.
All V8 Ski and Inboard Engines with a Serpentine Belt.
Changes
The Power Steering pump pulley material and diameter are changing. The easiest way to
tell them apart is by using a magnet near the outer diameter of the pulley.
Before ordering any serpentine belt parts, refer to the information below.
V6 and V8 305/350 cid engines:
Old pulleys were plastic and 4-3/4 in. (121 mm) in diameter. The new pulley will be metal
and 5-3/4 in. (146 mm) in diameter. The plastic power steering pump pulley is going to
become NLA. For a replacement pulley for an engine with a plastic pulley, order a Belt/Pulley Kit.
A new Belt Kit will be required when installing a Closed Cooling Kit on V6 and V8 305/350
cid Sterndrive engines with the metal 5-3/4 in. (146 mm) pulley.
V8 454/502 cid engines:
Old pulleys were plastic and 4-3/4 in. (121 mm) in diameter. The new pulley will be metal
and 5-3/4 in. (146 mm) in diameter. The plastic power steering pump pulley is going to
become NLA. For a replacement pulley for an engine with a plastic pulley, order a Belt/Pulley
Kit.
For MCM Alpha Models
V6 and V8 305/350 cid with plastic P/S pulley.
Order 57-861758A1 (A)-Replacement Belt/Pulley Kit. Contains 5-3/4 in. (146 mm) pulley and longer belt.
V6 with plastic P/S pulley and Closed Cooling.
Order 57-861759A1 (Note 1) (B)-Replacement Belt/Pulley Kit. Contains 5-3/4 in. (146 mm) pulley and longer belt.
V8 305/350 cid with plastic P/S pulley and Closed Cooling.
Order 57-861049A2 (Note 1) (C)-Replacement Belt/Pulley Kit. Contains 5-3/4 in. (146 mm) pulley and longer belt.
V6 with metal 5-3/4 in. (146 mm) P/S pulley.
Order 807901A6 (Note 1) (B)-Order this Belt Kit if a Closed Cooling Kit is going to be installed on the engine.
V8 305/350 cid with metal 5-3/4 in. (146 mm) P/S pulley.
Order 807901A5 (Note 1) (C)-Order this Belt Kit if a Closed Cooling Kit is going to be installed on the engine.
V6 and V8 305/350 cid with metal 5-3/4 in. (146 mm) P/S pulley.
Order 807901A4 (D)-Order this Belt Kit if P/S pump and hoses are going to be removed on second engine in dual engine boat.
NOTE 1: Closed Cooling heat exchanger may have to be moved to starboard slightly to clear new, larger pulley.
MCM Bravo Models
V6 and V8 305/350 cid with plastic P/S pulley.
Order 57-861757A1 (E)-Replacement Belt/Pulley Kit. Contains 5-3/4 in. (146 mm) pulley and longer belt.
V6 and V8 305/350 cid with plastic P/S pulley and Closed Cooling.
Order 57-861049A2 (Note 1) (C)-Replacement Belt/Pulley Kit. Contains 5-3/4 in. (146 mm) pulley and longer belt.
V6 and V8 305/350 cid with metal 5-3/4 in. (146 mm) P/S pulley.
Order 807901A5 (Note 1) (C)-Order this Belt Kit if a Closed Cooling Kit is going to be installed on the engine.
V6 and V8 305/350 cid with metal 5-3/4 in. (146 mm) P/S pulley.
Order 807901A3 (Note 1)(F)-Order this Belt Kit if P/S pump and hoses are going to be removed on second engine in dual engine boat.
V8 454/502 cid with plastic P/S pulley.
Order 57-861049A1 (Note 1) (G)-Replacement Belt/Pulley Kit. Contains 5-3/4 in. (146 mm) pulley and longer belt.
V8 454/502 cid with metal 5-3/4 in. (146 mm) P/S pulley.
Order 57-861050 (H)-Order this Belt Kit if P/S pump and hoses are going to be removed on second engine in dual engine boat.
NOTE 1: Closed Cooling heat exchanger may have to be moved to starboard slightly to clear new, larger pulley.
Replacement Belts Only for MCM Alpha Models
V6 and V8 305/350 cid with plastic P/S pulley. A Order 57-807755--2 ss 57-861758A1
V6 with plastic P/S pulley and Closed Cooling. B Order 57-807755--7
V8 305/350 cid with plastic P/S pulley and Closed Cooling. C Order 57-807755--3 ss 57-861049A2
V6 and V8 305/350 cid with metal 5-3/4 in. (146 mm) P/S pulley A Order 57-861758
V6 with metal 5-3/4 in. (146 mm) P/S pulley and Closed Cooling. B Order 57-861759
V8 305/350 cid with metal 5-3/4 in. (146 mm) P/S pulley and Closed Cooling. C Order 57-861049
V6 and V8 305/350 cid without a P/S pulley, second engine in dual engine boat D Order 57-807755--5
Replacement Belts Only for MCM Bravo Models
V6 and V8 305/350 cid with plastic P/S pulley. E Order 57-807755--1
V6 and V8 305/350 cid with plastic P/S pulley and Closed Cooling. C Order 57-807755--3 ss 57-861049A2
V6 and V8 305/350 cid with metal 5-3/4 in. (146 mm) P/S pulley. E Order 57-861757
V6 and V8 305/350 cid with metal 5-3/4 in. (146 mm) P/S pulley and Closed Cooling. C Order 57-861049
V6 and V8 305/350 cid without a P/S pulley, second engine in dual engine boat F Order 57-807755--4
V8 454/502 cid with plastic P/S pulley. G Order 57-861049
V8 454/502 cid with metal 5-3/4 in. (146 mm) P/S pulley G Order 57-861049--1
V8 454/502 cid without a P/S pulley, second engine in dual engine boat H Order 57-861050
Replacement Belts Only for MIE and Ski and Inboard Models
V8 305/350 cid F Order 57-807755--4
V8 454/502 cid H Order 57-861050
Belts for V6 and V8 305/350 cid Sterndrive Engines With a High Mounted Delco 65A Alternator.
NOTE 1:All ski, inboard and 454/502 cid engines were not affected by the Delco 65A alternator.
MCM Sterndrive Models
V6 and V8 305/350 cid Alpha with P/S pulley. Order 57-862086 (J)-Replacement Belt.
V6 and V8 305/350 cid Alpha without P/S pulley Order 57-862088 (K)-Order this Belt if P/S pump and hoses are going to be removed on second engine in dual engine boat.
V6 and V8 305/350 cid Bravo with P/S pulley. Order 57-862087 (L)-Replacement Belt.
V6 and V8 305/350 cid Bravo without P/S pulley. Order 57-862089 (M)-Order this Belt if P/S pump and hoses are going to be removed on second engine in dual engine boat.
