Manuals for Samofa Diesel Engines


The Samofa diesel company - full name SAmenwerkende MOtoren FAbrikanten - was founded in Harderwijk, Holland, in 1949 building small, water-cooled diesel engines mainly for the Netherlands, Belgium and Luxembourg markets.  The company began importing Mitsubishi engines in 1971 and was taken over by Mitsubishi in 1980.

Dennison Berwick portrait

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3 simple steps to make your diesel system reliable and robust

STEP ONE  - Get the manuals for your equipment

Owner, Workshop and Parts Manuals are important documents that should be part of every vessel's library. They contain the detailed information necessary for safe operation, maintenance and correct servicing.  

The manuals on this page are provided for public information and education and can be downloaded for free.  All copyrights belong to copyright holders stated in the documents.

congratulations - by downloading these free manuals you are taking an important step towards making your engine more reliable and robust.


STEP TWO - regular maintenance

Simple, regular maintenance is the easiest, quickest and cheapest way to avoid problems and accelerated engine wear. Most expensive repairs start from a lack of basic maintenance or ignoring small warnings. The work is not difficult - it just needs to be done.

The purpose is so that we can enjoy our boat for all the reasons we bought her. Trust yourself. Do the work regularly and be methodical.


Download free checklists here

if you need clear, easy-to-understand help

300+ drawings

Seeing is Understanding

Marine Diesel Basics 1
Maintain, Winterize and Recommission

•  explains all parts of the marine diesel system - fuel,
lubrication, breathing, electrics, stern gland, propeller etc.
•  140+ tasks, 300+ drawings, 222 pages
•  tasks are fully explained with clear drawings and minimal text
•  all tools & supplies needed are illustrated for each task
•  paperback US$15.99 £10.99 €12.99
•  ebook (kindle, kobo, ibooks, google, epub) US$9.99


STEP THREE - keep a Maintenance Logbook

Keep a detailed and accurate record:

  1. all the work done on your diesel system - what, when  & by who
  2. inventory of serial numbers, component descriptions
  3. early warning of potential problems
  4. time and details of any changes in performance

Use a notebook or use your iPad, tablet or desktop and record the information in an editable PDF directly as you work.

click to enlarge

Maintenance eLogbook

If you've every struggled to keep a logbook, this editable eLogbook may be exactly the help you need.

- "fillable form" PDF
- clickable checklists
- write, edit  details of all tasks completed
- 40+ drawings to help inspections
- all common measurements with live calculators
- just $7.99 196 pages

"the Perfect Logbook" - verified purchaser

Samofa 4DQ5 diesel engine Manual


4DQ5 (Mitsubishi)

(in Dutch)


43 pages
publ. April 1978


2 MB file

Mitsubishi Samofa Diesel Engine 4DQ50 Parts Catalog

Parts Catalog

Mitsubishi 4DQ50 (for Samofa)


119 pages
publ. - no date given



MB file

Mitsubishi 4DQ50 diesel engine Service Manual in English

Service Manual

4DQ50 Mitsubishi

(in English)


118 pages
publ. - no date given

3 MB file

Samofa 80 Series diesel engine Brochure


SH 80
SH 85

(in English)


4 pages
publ. - no date given


MB file

Samofa SH 80, SH 85 diesel Manual Dutch



(in Dutch only)


8 pages
publ. - no date given

1 MB file

Samofa 108W diesel engine Manual Dutch



(in Dutch)

20 pages
publ. - no date given


5 MB file

Samofa S8 Manual 1954 Dutch




16 pages
publ. January 1954


3 MB file

Samofa S108 Series diesel enginesbrochure


Diesel Sets

4 pages

publ. - no date given


1 MB file

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