Name: Genuine Tohatsu Nissan Outboard Thermostat 345-01030-1 25HP 30HP 40HP 50HP TLDI
Brand: Tohatsu-AtB
SKU: 345-01030-1
Price: 33.99 GBP
Availability: InStock

Genuine Tohatsu Nissan Outboard Thermostat 345-01030-1 25HP 30HP 40HP 50HP TLDI

Dispatched in 2-3 days

30 Day Return Policy

Low stock - 2 items left
Backordered, shipping soon

Our stock levels are dynamic and can change frequently. If a product appears to be in stock, it may have already sold out. Please contact us if you have any questions about availability. Thank you for your understanding.

£33.99

Tax included.

Tohatsu Thermostat 345-01030-1

Genuine OEM Part for TLDI & Standard Outboards

This Genuine Tohatsu Thermostat (345-01030-1) is a critical cooling system component designed to maintain your engine's ideal operating temperature. Specifically calibrated for the unique requirements of Tohatsu and Nissan marine engines, this thermostat ensures that the engine warms up quickly and operates within the manufacturer-specified range of 50°C (122°F).

PERFORMANCE: Proper temperature regulation is vital for TLDI models to ensure complete fuel combustion and prevent carbon build-up, protecting your engine from premature wear.

Key Features

✔ Genuine Tohatsu Factory Part
✔ Precision 50°C (122°F) Activation
✔ Corrosion-resistant Marine Materials
✔ Protects against engine overheating

Technical Specs

Part Number:	345-01030-1
Opening Temp:	50°C / 122°F
Material:	Brass & Stainless Steel
Manufacturer:	Tohatsu / Nissan

Compatibility / Fitment Guide

Engine Type	Models	Notes
2-Stroke TLDI	MD25, MD30, MD40, MD50, MD70, MD90	Fits all series (A/B/B2)
2-Stroke Standard	M25, M30, M40	Twin Cylinder models
4-Stroke MFS	MFS2, MFS2.5, MFS3.5, MFS4, MFS5, MFS6, MFS8, MFS9.8, MFS15, MFS18, MFS20, MFS25, MFS30	Check original PN

OEM Cross Reference

Tohatsu / Nissan:	345-01030-1, 345-01030-0, 3H6-01030-0, 346-01030-1, 350-01030-1
Mercury Marine:	8M0228409, 8M0065545, 804540
Sierra Marine:	18-3638

Questions & Answers

Is this a genuine original part?

Yes, this is a genuine Tohatsu OEM part, packaged and supplied as an original equipment replacement.

Why is the opening temperature set to 50°C?

Many Tohatsu outboards, including TLDI models, use a 50°C (122°F) thermostat to prevent salt crystallization in the water passages, which typically occurs at higher temperatures in saltwater environments.

Does this include the gasket?

This SKU is for the thermostat unit itself. For a full service, we recommend purchasing the corresponding gasket (Tohatsu Part No. 346-01032-0 or 3T5-01032-0 depending on model) separately.

Note: Please verify your original part number against the references above or contact us at 4boats.co.uk for fitment assistance.

For the products under £150 the shipping is £6.99.

Free delivery for most items over £150.

Why choose us

QUALITY MARINE PARTS

We source dependable marine products from established suppliers and continually refine our range using customer feedback.

TRUSTED SUPPLIERS

We work with trusted marine suppliers and distribution partners to provide reliable parts, equipment and fulfilment.

Simple_Image_Play_Built_into_Routine_Cosmetics_TikTok_In-Feed_Ad_1080_x_1080_px_10 - 4Boats

PERSONAL SERVICE

Every order is checked by the 4Boats team. Contact us before ordering if you need help with part numbers, compatibility or availability.

Genuine Tohatsu Nissan Outboard Thermostat 345-01030-1 25HP 30HP 40HP 50HP TLDI