Yanmar 3qm30h manual

Every other year the head bolts are torqued, and the valves adjusted, the raw water pump has had the seals replaced a number of times. Hoses are changed all the time. We keep at least three spares of the hoses. The motor mounts have been changed 8 years ago. The starboard forward mount takes the worst punishment because of the diesel fuel that always spills while changing the on engine filter.

Last summer the salt water side was flushed with "Barnacle Buster", which made a big difference in the engine's cooling. I've always been told that with good maintenance, the Yanmar should last for 10, hours. We're counting on that. My only worry is that parts for it are getting harder and harder to find. Tommy Any chance of you and Kathleen coming up our way this summer?

Pete I replaced that drain valve on the exhaust manifold many years ago. The problem was the threads into the manifold are metric. I used a regular bronze petcock type valve with NPT threads.

But had to make a NPT to Metric close nipple to install it. Jim, We may be able to go that way. I expect to retire from my job of the last 38 years then I plan to go to work for a service company. It depends upon the health of my parents and my mother-in-law. I'll give you plenty notice if we can make it. Jim, thanks for sharing your experiences and insights. Hope to keep mine going a long time as well! I have a three questions I need your help on.

I found a diesel mechanic willing to work on my 3QM30F finally. Is the service manual in this thread above the same as the repair or mechanic manual he might need? He is going to adjust the valves, clean out the exhaust manifold and replace the fuel lift pump. All preventive work. My primary fuel filter is out of the dark ages. See our User Agreement and Privacy Policy. See our Privacy Policy and User Agreement for details. Create your free account to read unlimited documents.

It is this level of detail, along with hundreds of photos and illustrations, that guide the reader through each service and repair procedure. Complete download comes in pdf format which can work under all PC based windows operating system and Mac also, All pages are printable. Using this repair manual is an inexpensive way to keep your vehicle working properly. Thanks for visiting!

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Construction 2. Injection Pump 5. Disassembly 3. Injection Valve 6. Reassembly 4. Fuel Filter 5. Fuel Feed Pump 6. Fuel Tank Option. Governor 2. Injection Limiter 3. No-Load Maximum Speed Limiter 4. Idling Adjuster. Intake and Exhaust System 2.

Intake Silencer 3. Exhaust System 4. Breather Pipe 5. Intake Man if old 3QM30 H 1. Fuel Oil and Lubricating Oil 2. Oil Pump 3. Oil Filter 4. Oil Pressure Regulator Valve 5. Oil Pressure Measurement. Cooling System 2. Water Pump and Bilge Pump Option 3. Thermostat 4. Anticorrosion Zinc 5. Kingston Cock 6. Bilge Strainer B. Fresh Water Pump 3.