Genuine Tohatsu Cylinder Head Gasket MD40 MD50 TLDI 3T5-01005-0

Genuine Tohatsu cylinder-head gasket for selected three-cylinder MD40 and MD50 TLDI outboards. Part 3T5-01005-0 seals the cylinder block and head across the combustion, cooling and pressure passages.

Key Features

• Genuine Tohatsu cylinder-head gasket
• For selected three-cylinder 40–50 HP TLDI powerheads
• Original bore, passage and bolt-hole layout
• Supplied as one head gasket
• Also available within some powerhead gasket sets

Technical Specs

• Manufacturer: Tohatsu
• Part type: Cylinder-head gasket
• Engine type: Three-cylinder TLDI two-stroke
• Manufacturer part number: 3T5-01005-0
• Quantity: 1

Compatibility / Fitment Guide

Listed for selected MD40A/B/B2 and MD50A/B/B2 TLDI outboards. It is not for 3.5–6 HP engines as previously described. Later service information may list a revised 3C8-series gasket, so confirm the engine model, serial number and current parts diagram.

Part Number Cross Reference

• Tohatsu: 3T5-01005-0
• US catalogue format: 3T5010050M
• Later/alternate Tohatsu reference: 3C8-01005-5
• Mercury/Mariner cross-reference used on applicable shared engines: 27-812939 10

Frequently Asked Questions

Is this the head-cover gasket?
No. This is the main cylinder-head gasket; the cover gasket has a different part number.

Can the gasket be reused?
No. A cylinder-head gasket is a compression seal and should be replaced whenever the head is removed.

What else should be checked?
Inspect head flatness, sealing surfaces, fasteners and cooling passages, then follow the specified torque sequence.