🏷️ Basic Information Identification Make: Mercury MerCruiser Model: GM V-6 Cylinder Marine Engines Year: 1983-1993 Generation: N/A 📋 Manual Details Information Manual Type: Workshop Service Repair Manual Language: English Format: PDF Availability Download Type: Instant Download Printable: Yes Compatibility Operating Systems: Windows & Mac Requirements Software: Adobe PDF Reader ⚙️ Engine Specifications Engine 1 Model Code: MCM 185R Displacement Cid: 229 Displacement Liters: 3.8L Serial Number Range: 6289593 to 6919655 Engine 2 Model Code: MCM 185MR Displacement Cid: 262 Displacement Liters: 4.3L Serial Number Range: 6919656 to 0A483580 Engine 3 Model Code: MCM 185 Alpha I Serial Number Range: 0A483581 to 0B455459 Engine 4 Model Code: MCM 175 Alpha I Serial Number Range: 0B455460 to 0B773242 Engine 5 Model Code: MCM 4.3 Litre Alpha I Serial Number Range: 0B773243 to 0F000000 Engine 6 Model Code: Sea Ray 4.3L-2 Alpha I Serial Number Range: 0B785483 to B921276 Engine 7 Model Code: MCM 205MR Serial Number Range: 6919687 to 0A483776 Engine 8 Model Code: MCM 205 Alpha I Serial Number Range: 0A48377 to 0B775129 Engine 9 Model Code: MCM 4.3 Litre LX Alpha I Serial Number Range: 0B775130 to 0F000000 Engine 10 Model Code: Sea Ray 4.3L-4 Alpha I Serial Number Range: 0B785981 to B922330 🔧 Transmission Drive System Drive Type: Inboard/Outboard (Alpha I) Drive Units: Alpha One 🔧 Maintenance General Maintenance Focus: Service and Repair Target Audience: Do-It-Yourselfer 📄 Manual Sections Covered Coverage Important Information: Yes Removal And Installation: Yes Engine Mechanical: Yes Electrical: Yes Fuel System: Yes Closed Cooling: Yes Power Steering: Yes