I am about to purchase an Autostream feathering prop. I currently have a 3 blade fixed 480 diameter prop. It has been difficult to obtain the correct reduction ratio. My Yanmar 50hp manual states it has a 1:1.47 ratio but the box is stamped 2.63. Is it safe to assume the gearbox is correct?
- Status
gear box ratio
My first thougth is to assume that the box has the correct ratio marked on it.Just to be sure it is the correct one have a prop shop run the calucations for both ratio and the correct one should be easy to match against the spec.
My first thougth is to assume that the box has the correct ratio marked on it.Just to be sure it is the correct one have a prop shop run the calucations for both ratio and the correct one should be easy to match against the spec.
Gear Box
Hello Mike, The gear box reduction gear ratio 2.63, that you listed, is a standard. The manufacture of the transmission Yanmar uses stamps the reduction gear ratio on the tag attached to the trans. They should have also stamped it on the engine serial plate. The 1:1.47 is not standard and if listed that way would indicate a reverse reduction. Good luck. Kevin
Hello Mike, The gear box reduction gear ratio 2.63, that you listed, is a standard. The manufacture of the transmission Yanmar uses stamps the reduction gear ratio on the tag attached to the trans. They should have also stamped it on the engine serial plate. The 1:1.47 is not standard and if listed that way would indicate a reverse reduction. Good luck. Kevin
Thankyou to gearbox ratio
Thank to you all for such a quick response. The gearbox stamp seem to be the correct one. It's great to get replies from the other side of the world.
Thank to you all for such a quick response. The gearbox stamp seem to be the correct one. It's great to get replies from the other side of the world.
- Status