In this situation - the idle rpm setting of the engine becomes very important to the overall durability of the drive train.Īt 1000 engine rpm with this type of clutch - the output shaft goes to engine rpm speeds in ~ 1 millisecond - a huge acceleration. No other manufacturer of Saildrives uses this type of clutch arrangement. The nature of this " clutch " - which is not really a clutch in the conventional sense - is that while it provides a very simple economical and robust mechanism that cannot ever slip - the trade-off is that engagement is instant once the dogs on the driving shaft engage with their matching dogs on the driven shaft. It is very important to understand the quite unique nature of this Saildrive in that it alone in the industry has what is described as a " dog clutch " to engage Ahead and Reverse. Yanmar model SD20 Saildrives are fitted to all Yanmar engines under 30 hp when a Saildrive option is selected with a Yanmar engine.
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