I just purchased a Hunter 30T. So far, I love the boat, but am a bit nervous about the yanmar deisel. Is there anything that I should know about this engine? It runs well, but I've never had experience with this engine before. Any advice concerning maintence or querks would be appreciated. ps. by the way, the boat sails like a dream!
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yanmar
i not sure what you are looking for here but yanmar has a great engine and they run forever! You did not say what model engine but all model have a good reputation.The only thing I could recomend is to do the normal maintance (i.e. oil and filter changes, impeller etc) With proper care these engines will last a lifetime !
i not sure what you are looking for here but yanmar has a great engine and they run forever! You did not say what model engine but all model have a good reputation.The only thing I could recomend is to do the normal maintance (i.e. oil and filter changes, impeller etc) With proper care these engines will last a lifetime !
ditto!
Terry: I agree with Petes comments. With proper care these engines will last for 12k-15k hrs. You must change the oil at least annually, replace the raw water impeller every two years. Change the engine coolant every two years. Make sure your belts and hoses are always in good shape. Valve adjustment is suppose to be done every 500 hours (best done by a pro). For your first service on this engine I would suggest two things. First get the manuals for the engine. The yanmar manuals are not the well written but it will help you understand about the engine. Have a professional YANMAR service done on the engine AND be there when it is done. Have the service person show you how to do the basic stuff (changing filters air/fuel/oil, changing the oil, bleeding the fuel system and changing the impeller). Take care of your Yannie and it will take care of you. PS: NEVER run out of fuel.
Terry: I agree with Petes comments. With proper care these engines will last for 12k-15k hrs. You must change the oil at least annually, replace the raw water impeller every two years. Change the engine coolant every two years. Make sure your belts and hoses are always in good shape. Valve adjustment is suppose to be done every 500 hours (best done by a pro). For your first service on this engine I would suggest two things. First get the manuals for the engine. The yanmar manuals are not the well written but it will help you understand about the engine. Have a professional YANMAR service done on the engine AND be there when it is done. Have the service person show you how to do the basic stuff (changing filters air/fuel/oil, changing the oil, bleeding the fuel system and changing the impeller). Take care of your Yannie and it will take care of you. PS: NEVER run out of fuel.
Mixing Elbow
In additon what the previous responders mentioned, one of the less frequent fix-it items is cleaning and/or replacement of the mixing elbow. This is the upside-down U-shapped pipe at the aft end of the engine which has the exhaust hose attached. Cleaning of the mixing elbow is not recommended and it is very hard to do. The casting will eventually rust through anyway so it's better just to replace it than have a surprise and a time when you can least afford it. With time the diesel exhaust particles will clog up and constrict the passageway and cause backpressure for the exhaust. The buildup is black and has the consistency of very hard plastic. If undetected the backpressure will cause the cooling system to work harder and it will not be unable to keep up with the heat dissapation (oh, flush the fresh water cooling system and replace the antifreeze regularly!) and also cause the engine to work harder. A tell-tale sign is at cruise RPM (at least 2850 RPM) there will be more steam comming out the exhaust than usual. Running the engine at slower RPMs will increase buildup in the elbow. The coupling that connects the mixing elbow to the engine has both right and left hand threads to enable dissassembly of the elbow. A new elbow costs a little over $100 and the coupling (which could also need to be replaced if damaged) also costs around $100 (US). This is a good item to discuss with the mechanic.
In additon what the previous responders mentioned, one of the less frequent fix-it items is cleaning and/or replacement of the mixing elbow. This is the upside-down U-shapped pipe at the aft end of the engine which has the exhaust hose attached. Cleaning of the mixing elbow is not recommended and it is very hard to do. The casting will eventually rust through anyway so it's better just to replace it than have a surprise and a time when you can least afford it. With time the diesel exhaust particles will clog up and constrict the passageway and cause backpressure for the exhaust. The buildup is black and has the consistency of very hard plastic. If undetected the backpressure will cause the cooling system to work harder and it will not be unable to keep up with the heat dissapation (oh, flush the fresh water cooling system and replace the antifreeze regularly!) and also cause the engine to work harder. A tell-tale sign is at cruise RPM (at least 2850 RPM) there will be more steam comming out the exhaust than usual. Running the engine at slower RPMs will increase buildup in the elbow. The coupling that connects the mixing elbow to the engine has both right and left hand threads to enable dissassembly of the elbow. A new elbow costs a little over $100 and the coupling (which could also need to be replaced if damaged) also costs around $100 (US). This is a good item to discuss with the mechanic.
Dandy Yannie
Terry, I just traded my '91 30T for a new 380. Both have Yanmar engines and I don't think I ever want any other brand. All I ever did on the '91 Yanmar 2GM20F was keep the oil and oil filter changed annually and replace the belts at about 8 years. I sailed her in fresh water, so she wasn't subjected to the same corrosion potential that salt water boats do. Yanmar makes a sturdy, reliable, engine that will last you for years. Good luck and fair winds, Steve S/V Options
Terry, I just traded my '91 30T for a new 380. Both have Yanmar engines and I don't think I ever want any other brand. All I ever did on the '91 Yanmar 2GM20F was keep the oil and oil filter changed annually and replace the belts at about 8 years. I sailed her in fresh water, so she wasn't subjected to the same corrosion potential that salt water boats do. Yanmar makes a sturdy, reliable, engine that will last you for years. Good luck and fair winds, Steve S/V Options
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