|
Stuart D-10 Dual Cylinder
Marine Engine |
United Kingdom - Manufacture date:
1978
Bore = 3/4", Stroke 3/4", Flywheel diameter
= 1 5/8"
Style: Double Acting, dual cylinder,Vertical
marine |
Dimensions: 5 1/2" length x 4" width x 5
1/2" height |
|
 |
The Stuart D-10 Marine Engine |
|

This engine was built by the talented, Lou who also built the
Stuart H-9 engine in the collection. Lou does some very nice work and I've
been very pleased with the engines I've purchased from him. I suspect Lou
would be less than pleased with me if he knew the fate of this engine shortly
after I received it. This engine was accidentally knocked off its shelf and
the front cylinder tower was shattered. It sat on my work bench for nearly
a year before I decided I, with nearly no tools, was going to repair it.
Lou builds his engines with tolerances of ± 1/2 a thousandth of an inch
so the decision to rebuild it was a bit daunting considering I'd only have
a drill press to work the replacement casting. Lots of care and slow facing
with a fine flat hone and a makeshift cylinder hone, along with constant
checks with a micrometer went into the effort. |
|
I had very serious doubts that this engine would ever
run again since I'm no machinist and my available tools would certainly make
one shake his head in dismay. Slowly the micrometer began to tell me things
were coming together much better than I'd hoped. When the last surface
polishing was done, the measurements all matched the original piece. Much
to my surprise, once everything was assembled for a "final" test fitting,
the engine turned smoothly with almost no resistance.
As I've mentioned, Lou takes a lot of pride in his work. The slide valve
links and the connecting rods on this engine were hand contoured , rounded
and tapered for an elegant realistic look. A lot of rounded sides, edges
and ends were hand shaped to a perfect match throughout the drive train. |
 |
D-10 with polished flywheel, connecting rods
and slide valve links |
|
|
 |
Stuart Castings love
400, 1200 and 2500 grit paper but take it to
3 microns and magic
happens |
|
The engine was originally an institutional green and
with the raw casting, needed painting badly. Another disassembly ensued and
the castings were stripped and prepared for a new coat of red paint. While
the engine was apart, I broke out my trusty Dremel and jewelers rouge and
set to work adding a high shine to Lou's already sleek brass work. The machined
surfaces of the castings and flywheel were then hand polished using
400, 1200 and finally, 2500 grit paper. I learned that cast iron loves 2500
grit and takes a near mirrored stainless finish with very little effort.
All of the gaskets had to be replaced, but luckily an old steam collector
suggested cutting them from a $1.00 bill. The rag paper and silk make a perfect
gasket and stand up to cutting quite nicely. My confession to Lou and the
results of my misadventure are shown here. Lou...its stored safely way from
the edge this time. |
|
|
|
|
|