Witchards Marine diesel engine suppliers for your yacht or motor boat


Witchard's Marine have been in the marine diesel engineering business for over 30 years, and in 1995 started converting new diesel engines for marine usage, in response to growing demand. All the models seen in this website are based on the latest Kubota powerplants imported brand new from Japan. Kubota specialise in modern small diesel engine manufacture, and have a great reputation for reliablility. These hi-tech models are then 'marinized' or converted for yacht auxillery usage at our Mona Vale workshop (near Sydney, Australia). 

Our many years of experience in the maintenance, repair and installation of these powerplants are reflected in the straighforward, robust design of our engine conversions. We know first hand the importance skippers place on safety, reliability, economy, access and ease of maintenance. Over the years our reputation has grown and nowadays our engines are available to yachties all around the world. There are six models to choose from 12hp, 18hp, 22hp, 28hp, 35hp or 50hp. Welcome to our site, take your time to browse through these pages. We trust you will find a 'WM Diesel' engine suitable for your boat! 

WM 35 
Diesel Engine

John Witchard

Engine replacement
on yacht

Modern Kubota engines are renowned for their economy, reliability and low emissions. WM Diesels are covered by a full 12 months parts and labour warranty and the Kubota engine is covered by a 2 year world wide warranty. Our engineering upgrade is heavy duty, and only proven components are chosen. Standard features include ZF Hurth gearboxes, Johnson water pumps, Polyflex engine mounts, Bosch electrical gear and VDO instrumentation. All WM Diesel engines feature large capacity heat exchangers made from 'admiralty bronze' with heavy walled copra nickel tube, which is hand soldered together ( with 45% silver solder) for extra long life. The result is an uncompromising, hand engineered motor conversion, that will give you many years of safe boating enjoyment. 

Export trade is surging for WM Diesel, and our engines are specially crated for delivery right around the world. Email us for a price list.

Another benefit for our international customers is that shipping out of Australia, is very competitively priced. Why? Australian imports many products, on the return leg, shipping carriers experience an excess of unsold freight resulting in lower prices on the return voyage. We can quote on an engine delivered to anywhere in the world, or you can make your own delivery arrangements. Either way, you will be surprised at how cost effective it is to purchase ex Australia. NB: To navigate this site, simply click on the life-rings below to see a detailied brochure for each model.

Click on the life-rings above to navigate the site.

WM Diesel, Unit 1/10 Polo Avenue, Mona Vale 2103 New South Wales, Australia.
Phone +61 2 9979 5480 Fax +61 2 9979 8863 wmdiesel@tpg.com.au