outboard motors

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Scott 40
The 1960 40 beside a 1963 45. The motors have the same 43.7 c.i. piston displacement. Both have V-block reeds and dual carburetors, and are geared relatively high at 14/23, a little higher than the Mercury Mark 58. However, although oversquare, the stroke is too large and these motors won't wind up like a Mercury. However, they can be made to run pretty well. A Scott 40 on an Allison held the NOA OPC 40-50 class record at 40.5 mph in 1958. Joe increased it to 42.5 mph on an Allison in 1960.
Scott Mulloch 1960
Read view of the 40 and yet to be restored McCulloch 45. Meatball Murray located the 45 and gave it to Joe. McCulloch's 45 was too little too late, Mercury produced a very fast 44 c.i. 50 in 1961, the old Mark 58 with exhaust tuning added. The McCulloch Scott 40, 45, 60 and 75 were the most beautifully styled outboards of their era. Joe thinks he could get these motors running 42-45 mph on an appropriate boat with a modern prop, suitably reworked.
McCulloch Scott 40
1960 Scott 40: the same model was begun in 1957 except that shock mounts were changed from
springs to rubber OMC-style mounts in 1958. OMC 25/35 mounts can be used to replace the
4 side mounts.

Completed Restorations

1960 McCulloch Scott 40

The Scott-Atwater 40 was first produced in 1957. The name was changed to Scott in 1958 by McCulloch, who had bought Scott-Atwater. Bob McCulloch had raced boats in college and remained a racing enthusiast. The Scott 40 and 60 (made first in 1958) were popular in NOA OPC racing 1958 and 1959 where they enjoyed some success, especially setting speed records. The motors were not as fast as the Mercury Mark 58 and 78 in the same classes, but the Scott racing program was very good. They used Allison and Rose boats, which were faster than other production boats at that time. A Scott 40 set the record at 40.5 mph on an Allison in 1958, Joe upped the record to 42.5 mph with a Mark 58 on a porpoising Allison in 1960. The later record would have been higher without the porpoise.

The Scott had V-block reeds, the intake system of choice today but has a too long stroke and so doesn't wind as high as the Mercurys of that era. The Scott 40 was bumped to 45 hp in 1961 but in 1961 Mercury offered the Merc 500 with tuned exhaust. Nothing could run with that notor in the 44 c.i. class until OMC made the 45 c.i. 55 hp model in 1976.

Three_River

This clean Scott 40, a fresh water motor from Michigan, still has good compression. What we did: replaced the fuel pump diaphragm, fuel lines, spark plugs and gear oil. Cleaned and adjusted the points, the condensers and coil are good. We had the bent bronze prop welded, then repitched it. This Scott is ready to run on a fast 12-14' sport boat or racing hull.