Silver Maiden's conversion was not without challenge. I do plan to document it at some point as I took pictures. The 1GM10 is physically much smaller than the P60 that was pulled out. Both are raw water cooled and both have the same shaft output RPM from the transmission. I did convert the 1GM10 to fresh water cooling. My first challenge was building up the engine bed to hold the LOWER output shaft at the right height.
I used black locust for the engine bed. It is hard to find, but worth the look harder than teak or oak and pretty much will not rot. You just have to work it slow. Once I worked out the rebuild of the engine bed it was pretty easy to swing the 120lb motor into place with a 4 part block rig. Held the motor with one hand and positioned with the other the dropped on the bed and just used body English for final alignment of the shaft.
The other thing I had to work out was the fresh water cooling circulating loop including finding a heat exchanger (gift from the owner of the marina), a circulating pump and deciding how it should all work as well as proper routing of the raw water to still be sucked by the raw water pump and shoved through the heat exchanger to the exhaust elbow.
I also had to plan the return for the diesel that does not go into the injector.
Looking back there was nothing hard about it, it just took planing and of course adjusting the plans as I went along and discovered how things would fit or fasten or whatever.
After doing Silver Maiden I would be willing to do a repower myself of pretty much any boat I might own. If you are handy and you are not rushed it is not beyond the skilled weekend mechanic. I did Silver Maiden over the winter and had her ready for spring.
I used black locust for the engine bed. It is hard to find, but worth the look harder than teak or oak and pretty much will not rot. You just have to work it slow. Once I worked out the rebuild of the engine bed it was pretty easy to swing the 120lb motor into place with a 4 part block rig. Held the motor with one hand and positioned with the other the dropped on the bed and just used body English for final alignment of the shaft.
The other thing I had to work out was the fresh water cooling circulating loop including finding a heat exchanger (gift from the owner of the marina), a circulating pump and deciding how it should all work as well as proper routing of the raw water to still be sucked by the raw water pump and shoved through the heat exchanger to the exhaust elbow.
I also had to plan the return for the diesel that does not go into the injector.
Looking back there was nothing hard about it, it just took planing and of course adjusting the plans as I went along and discovered how things would fit or fasten or whatever.
After doing Silver Maiden I would be willing to do a repower myself of pretty much any boat I might own. If you are handy and you are not rushed it is not beyond the skilled weekend mechanic. I did Silver Maiden over the winter and had her ready for spring.