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Old 05-11-2014, 07:46   #1
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Boat: Lagoon 380 #069
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Engines louder after overhaul

We recently had our, new to us, boat overhauled after purchase. The Yanmar technician replaced the Vetus waterlocks with a slightly different waterlocks. On closer inspection it appears the original LP60s were replaced with a pair of L50Rs. Now my wife is complaining the engines are louder since the overhaul.

Would the small difference in size contribute to the additional noise? I assumed the muffler was supposed to take care of this. I haven't been in the engine rooms since the haulout, I had to get back to work. But I believe Lagoons have a seperate muffler from the waterlock.
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Old 05-11-2014, 08:04   #2
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Re: Engines louder after overhaul

The 50 series is used for shorter exhaust hose length. Did you reconfigure anything along with the overhaul?
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Old 05-11-2014, 09:11   #3
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Re: Engines louder after overhaul

How much shorter? The waterlock is right next to engine block. The engine transom isn't that large so I think the exhaust hoses are 40-50cm.


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