Genuine Tohatsu Fuel-Tank Cap Assembly 393-70020-6 – M4C / M5B Integral Tanks
393-70020-6
- Dispatched in 2-3 days
- 30 Day Return Policy
- Low stock - 3 items left
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Regular price£24.94
/
Tax included.
Replace cracked or leaky caps in minutes
The Tohatsu 393-70020-6 fuel-tank cap assembly is the latest OEM screw cap fitted to integral plastic tanks on classic 4 hp and 5 hp two-stroke portables. A fresh cap restores a vapour-tight seal, prevents fuel slosh on choppy runs and cures the hard-starting issues caused by perished vent seals.
Key features
- Factory fit – identical thread and gasket profile for a perfect drop-in swap.
- Integrated two-way vent – balances pressure while blocking splash-back.
- Ethanol-resistant HDPE – compatible with modern E10 petrol; won’t swell or crack.
- UV-stable black finish – resists fading and embrittlement in harsh marine sun.
- Latest supersession – replaces older caps 393-70020-5 / -4 without modification.
Compatibility
Fits Tohatsu-built two-stroke outboards with a top-mounted integral tank, including:
- M4C / M5B
- Nissan Marine NS4C / NS5B
- Mercury / Mariner 4 hp & 5 hp (Tohatsu manufacture, 2002 →)
What’s in the box?
- 1 × Fuel-tank cap assembly (393-70020-6) with pre-fitted vent seal and O-ring
Installation tips
Simply unscrew the old cap, inspect the neck gasket, and thread the new cap hand-tight. Grease the O-ring lightly with silicone grease for easier removal and a longer service life.
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