Yanmar 2QM20 / 3QM30 EPB5563 Service Manual Call + 44 (0) 1206 302133 for expert advice How to place an order Terms of sale Account. Basket £0.00 (0) Shopping Basket. Yanmar Manuals. Yanmar Outdrives. Yanmar Saildrives. Boat Equipment. Anchoring Systems. Battery Chargers. Boarding Ladders. Boat Equipment. The full manual 'YANMAR 2QM20 et 3QM30' is downloadable from this page.
Contents. Specifications It is a, vertical, diesel engine. It is built around two (hence the '2' in 2GM20) of 75 mm in diameter and 72 mm in, adding up to 0.635 litres in displacement: each cylinder is roughly the size and volume of a 300 ml.
The compression system uses a proprietary swirl-type pre. The continuous rating output at the is 11.8 kW, at 3400 (rpm). The maximum output at the crankshaft is 13.4 kW, at 3600 rpm. The engine delivers roughly 16, for a weight of about 114 kg. The engine is equipped with a starting motor (D.C.
12V, 1 kW), and an to provide electricity and charge onboard (12, 55). The engine is typically activated by a key and a starting motor switch. Upon turning the key and pressing the starting motor switch, the oil pressure alarm will ring for about a second until the engine starts to run. The exit of cooling water from the into the sea (typically at the of the boat) should be checked at that time.
After a few minutes, the hot cooling water alarm will sound if the cooling water does not get through the engine (as when the seawater cock has remained closed -most likely case- or if something is clogging the seawater tubing). Water pump.
Yanmar 2GM20. Cooling seawater enters from the tube on the left.
The 2GM20 series uses either a, or an cooling system (specified by the suffix letter F i.e. Is pumped into the engine through a seawater ( type). In the engines equipped with a direct seawater cooling system, seawater is used to cool the internals of the engine directly. The engines equipped with a freshwater cooling system have an additional, where heat transfer occurs between the seawater and internal.
The impeller of the seawater pump can suffer from wear and tear, especially when run dry for some period of time, in which case it has to be replaced to avoid loss in the flow of cooling seawater, a potential source of engine overheating. A particularly difficult problem in tropical waters is jellyfish. Their tentacles can be sucked into water intakes. In extremis it is possible for the rubber exhaust hose to catch fire, the plastic silencer to melt and the head-gasket to fail. In colder waters, boats are far less likely to meet such problems.
The solution is to have a large basket-type water strainer and overheat alarms (standard on most Yanmar engines) The seawater pump is rotated by a short linked to the crankshaft. Fuel filter.
Yanmar 2GM20. An inline is easily accessible from the front part of the engine.
The filter retains solid particles and separates water from diesel (as water is heavier than diesel, it will settle at the bottom of the filter), just before the diesel fuel enters the highly sensitive high-pressure. Water inside diesel fuel can lead to rusting of the internals of the engine, as well as lubrication problems. The filter element is made of fluted paper with metal end caps. When the engine has to be bled because air has penetrated into the pipes (usually after running out of diesel), it will usually be necessary to bleed the diesel filter: the top vent is unscrewed so as to let excess air escape, while diesel fuel is pumped into the fuel filter with the manual fuel lift pump (just behind the yellow ).
The vent can be screwed shut when diesel fuel starts to gush out of it. A primary fuel filter is usually installed upstream of the engine, so as to filter out the larger particles, and filter a larger quantity of water that might be present in the fuel. Every time a filter is disassembled or changed, it will be necessary to bleed it so as to remove excess air, again by opening the top vent so as to let diesel chase all the air (diesel fills up the filter either through gravity -usually the case for the primary filter- or with the help of the fuel lift pump -usually the case for the engine fuel filter-) and diesel starts to gush out.
The vent should then be screwed shut. New models The 2GM20 and 3GM30 (three-cylinder) series have now been superseded in the Yanmar catalog by new lightweight and modernized engines, the 2YM15, 3YM20 and 3YM30. These new engines also feature simplified maintenance of the seawater pump and other services points, as they are now located on the front part of the engine. These new engines also meet new introduced in the EU and the US in 2006. Yanmar 2GM20 cooling seawater (in closed position). Versions. Yanmar 2GM20: Marine main engine (for export), cooling, model codes: 128271 (S, N, G).
Yanmar 2GM20-B: Marine main engine (domestic use), seawater cooling, model codes: 128271 (A, B, C). Yanmar 2GM20C: engine, seawater cooling, model code: 128271 E.
Yanmar 2GM20F: Marine main engine (for export), cooling, model codes: 128291 (S, N, G). Yanmar 2GM20FC: Saildrive engine, freshwater cooling. Yanmar 2GM20FV: Marine main engine, freshwater cooling, equipped with compact V-drive marine gear KM3V. Yanmar 2GM20FVE Notes.
This is the COMPLETE Official Service Repair Manual for the YANMAR 2QM20(H), 3QM30(H) MARINE DIESEL ENGINE. This manual contains service, repair procedures, assembling, disassembling, wiring diagrams and everything you need to know. Models Covered: Yanmar Marine Diesel Engine 2QM20(H), 3QM30(H) The Service Manual contains detailed information, electrical and hydraulic diagrams, actual real photo illustrations and schemes, which give you complete step-by-step operations on repair, servicing, technical maintenance & troubleshooting procedures for your machine. This manual offers full information you need for repair your machine. The information in this manual will enable you to find trouble and to understand how to repair and maintain your machine without going into service.
All pages are printable, so run off what you need and take it with you into the garage or workshop. TABLE OF CONTENTS: CHAPTER 1. GENERAL CHAPTER 2. BASIC ENGINE CHAPTER 3.
FUEL SYSTEM CHAPTER 4. GOVERNOR CHAPTER 5. INTAKE AND EXHAUST SYSTEM CHAPTER 6. LUBRICATION SYSTEM CHAPTER 7.
COOLING SYSTEM CHAPTER 8. CHAIN-OVERDRIVE HAND-OPERATED SYSTEM CHAPTER 9. REDUCTION AND REVERSING GEAR CHAPTER 10.
REMOTE CONTROL SYSTEM CHAPTER 11. ELECTRICAL SYSTEM CHAPTER 12. INSTALLATION AND FITTING CHAPTER 13. OPERATING INSTRUCTIONS CHAPTER 14. DISASSEMBLY AND REASSEMBLY CHAPTER 15. INSPECTION AND SERVICING. Model Specification: YANMAR 2QM20(H), 3QM30(H) MARINE DIESEL ENGINE.
Language: English. Total Pages: 349. File Format: PDF. Requirements: Adobe PDF Reader. ZOOM IN/OUT: YES.
INSTANT DELIVERY: YES. Specifications: FULLY PRINTABLE & BOOKMARKED.
Compatible: All Versions of Windows & Mac, APP ISO, Iphone, Ipod, Android etc This QUALITY manual is 100 percents COMPLETE and INTACT, no MISSING/CORRUPT pages/sections to freak you out! This PDF file is Bookmarked and SEARCHABLE to make what you need easy to find. Detailed illustrations, exploded diagrams, drawings and photos guide you through every service repair procedure. This manual can be viewed on any computer, as well as zoomed and printed.
Complete download comes in PDF format which can work under all PC based Windows operating system and Mac also. It saves to your hard-drive and can be burned to CD-ROM.
INSTANT DOWNLOAD MEANS THERE WILL BE NO SHIPPING COSTS OR WAITING FOR A PAPER OR CD MANUAL TO ARRIVE IN THE MAIL. YOU WILL RECEIVE THIS MANUAL TODAY VIA INSTANT DOWNLOAD ON COMPLETION OF PAYMENT VIA OUR SECURE PAYMENT PROCESSOR. WE ACCEPT ALL MAJOR CREDIT/DEBIT CARDS AND PAYPAL. YOU CAN DO THE REPAIRS YOURSELF AND SAVE MONEY $$$$$$$.