Have a 1994 Legend 37.5 with a Yanmar 3JH2E. The engine only has 200 hours on it. I've read lots of tips on maintaining the engine but have never read about the need to adjust (or check adjustment) of the valves. Thanks and a Happy New Year!
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Probably depends on the model but....
Glen: I would assume that it depends on the engine but they normally need an initial one at 50 hrs. After that the GM series needed an adjustment at every 500 hrs. According to Terry these newer engines have 1000 service interval for the valve adjustments. We have the same engine in our HV'36. I will probably figure a time to get my valves adjusted in the next year or two. Our engine is also a 1994 and has about the same number of hours.
Glen: I would assume that it depends on the engine but they normally need an initial one at 50 hrs. After that the GM series needed an adjustment at every 500 hrs. According to Terry these newer engines have 1000 service interval for the valve adjustments. We have the same engine in our HV'36. I will probably figure a time to get my valves adjusted in the next year or two. Our engine is also a 1994 and has about the same number of hours.
Terry re: cruising
Terry, my wife will be retiring in early 2008 (hopefully sooner) which will open-up our cruising possibilities considerably. We've owned the boat a couple of years now and have been mostly doing lots of upgrades and little shake-down cruises down here in the South Sound. Not bad cruising down here actually, definately no crowds. Once the big retirement day comes, we're planning on spending 3-5 months a year exploring BC. How 'bout you? Glen
Terry, my wife will be retiring in early 2008 (hopefully sooner) which will open-up our cruising possibilities considerably. We've owned the boat a couple of years now and have been mostly doing lots of upgrades and little shake-down cruises down here in the South Sound. Not bad cruising down here actually, definately no crowds. Once the big retirement day comes, we're planning on spending 3-5 months a year exploring BC. How 'bout you? Glen
Hi Glen, this past season we made our third ...
two month cruise into BC waters. First year was Desolation Sound, second was Discovery Islands and this year was Broughton Archipelago. Next year probably a circumnavigation of Vancouver Island. Many wonderful experiences. We've talked about doing a south sound cruise. Some day perhaps. Terry
two month cruise into BC waters. First year was Desolation Sound, second was Discovery Islands and this year was Broughton Archipelago. Next year probably a circumnavigation of Vancouver Island. Many wonderful experiences. We've talked about doing a south sound cruise. Some day perhaps. Terry
Not worth it
My Yanmar 18 was recommended to re-do the valves at 200 hours, which I did. But there is no appreciable difference for the $240 it cost. I would say if the engine is knocking, then do it. If the enjine is shimmying, a realignent of the shaft is more in order.
My Yanmar 18 was recommended to re-do the valves at 200 hours, which I did. But there is no appreciable difference for the $240 it cost. I would say if the engine is knocking, then do it. If the enjine is shimmying, a realignent of the shaft is more in order.
Valve adjustment NOW
What is the big deal about valve adjustment? It is NOT brain surgery. Pop the cover, turn the engine slowly to the position shown in your Selock service manual, slide a little thin piece of metal in between the valve stem and rocker and feel for a slight drag on the feeler. The feeler set might go as much as $5.00 these days. Too tight valve settings will cause the valve to burn. too loose will bang parts to the point where they peen over. Your first time ever on a cylinder might take an hour. The next maybe 10 minutes once you have the "feel". Take your time, get it right. If you think you got it wrong, re-do it. Have you got anything better to do in the cold of winter till you can get the boat back in the water? I could certainly find a lot of things to do with $240.00 (which I think is really high!), like buy the Selock manual from Amazon or B & N and still have about $210.00 left over for shiny stuff. By the way; knocking or shimmying have nothing to do with valve adjustment. It's about proper valve timing and clearances for parts at running temperature. Once the damage from bad clearance is done no amount of adjustment can cure it.
What is the big deal about valve adjustment? It is NOT brain surgery. Pop the cover, turn the engine slowly to the position shown in your Selock service manual, slide a little thin piece of metal in between the valve stem and rocker and feel for a slight drag on the feeler. The feeler set might go as much as $5.00 these days. Too tight valve settings will cause the valve to burn. too loose will bang parts to the point where they peen over. Your first time ever on a cylinder might take an hour. The next maybe 10 minutes once you have the "feel". Take your time, get it right. If you think you got it wrong, re-do it. Have you got anything better to do in the cold of winter till you can get the boat back in the water? I could certainly find a lot of things to do with $240.00 (which I think is really high!), like buy the Selock manual from Amazon or B & N and still have about $210.00 left over for shiny stuff. By the way; knocking or shimmying have nothing to do with valve adjustment. It's about proper valve timing and clearances for parts at running temperature. Once the damage from bad clearance is done no amount of adjustment can cure it.
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