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Author Topic:   30-inch Shaft on 25-inch Transom

onlyawhaler posted 01-03-2013 12:58 AM ET (US)
I have a friend up here in Utah that I have been converting over to Whaler for years and he finally [bought] a NICE used 1996 21 Outrage without an engine. He has been out with me on mine for years and we finally have a convert.
This 21-foot model is similar to my [1999] Outrage 20 in many ways in the layout, but comes with a generous 300-HP limit on the capacity plate. Because of altitude and ego, we want to go for the maximum horsepower and still keep on a used-re-power budget. A new engine isn't in the running, so we are looking in the used market
He has Yamaha rigging on it and I am pushing him to find a late model 2005 Yamaha 300 HPDI that has the updates and certified low hours. Those seem to be the trouble free ones of that model and era. We have found one with 197 certified hours. It looks mint out on the East Coast. It is a 30-inch shaft, however, and his Outrage takes a 25-inch shaft. Those 300's in a 25 inch shaft are much harder to find mint, and we would like to make this one work if we can.
Does mounting this potential 300 on a simple transom plate that elevates it 5-inches make this whole thing come together? Seems like a simple fix. I appreciate any comments?
Thanks
Sterling
Onlyawhaler
Peter posted 01-03-2013 02:02 PM ET (US)
Probably does. But I thought those 21s could take twin 25 inch shaft outboards so that a 30 was needed for a single?
Tom W Clark posted 01-03-2013 03:33 PM ET (US)
The 1996 Outrage 21 came standard with a 25" transom. Whaler offered a 30" Transom option for 25" dual motors or a single 30" motor.
The easiest way to accommodate a 30" engine on a 25" transom is with the CMC 5" vertical extension:
http://www.cmcmarineproducts.com/products/Outboard-Jack-Plates/ Static-Height-Plates/CMC-Static-Jack-Plate-5-inch-vertical-extension
If you use a set-back jack plate, it will have to accomodate more than 5" of vertical lift.

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Author	Topic: 30-inch Shaft on 25-inch Transom
onlyawhaler	posted 01-03-2013 12:58 AM ET (US) I have a friend up here in Utah that I have been converting over to Whaler for years and he finally [bought] a NICE used 1996 21 Outrage without an engine. He has been out with me on mine for years and we finally have a convert. This 21-foot model is similar to my [1999] Outrage 20 in many ways in the layout, but comes with a generous 300-HP limit on the capacity plate. Because of altitude and ego, we want to go for the maximum horsepower and still keep on a used-re-power budget. A new engine isn't in the running, so we are looking in the used market He has Yamaha rigging on it and I am pushing him to find a late model 2005 Yamaha 300 HPDI that has the updates and certified low hours. Those seem to be the trouble free ones of that model and era. We have found one with 197 certified hours. It looks mint out on the East Coast. It is a 30-inch shaft, however, and his Outrage takes a 25-inch shaft. Those 300's in a 25 inch shaft are much harder to find mint, and we would like to make this one work if we can. Does mounting this potential 300 on a simple transom plate that elevates it 5-inches make this whole thing come together? Seems like a simple fix. I appreciate any comments? Thanks Sterling Onlyawhaler
Peter	posted 01-03-2013 02:02 PM ET (US) Probably does. But I thought those 21s could take twin 25 inch shaft outboards so that a 30 was needed for a single?
Tom W Clark	posted 01-03-2013 03:33 PM ET (US) The 1996 Outrage 21 came standard with a 25" transom. Whaler offered a 30" Transom option for 25" dual motors or a single 30" motor. The easiest way to accommodate a 30" engine on a 25" transom is with the CMC 5" vertical extension: http://www.cmcmarineproducts.com/products/Outboard-Jack-Plates/ Static-Height-Plates/CMC-Static-Jack-Plate-5-inch-vertical-extension If you use a set-back jack plate, it will have to accomodate more than 5" of vertical lift.