|
|
|
|
||
|
Engine rebuild - 1983 |
|
|
||
|
|
||||
|
Gray Marine Lugger Light 4 69 cubic inch 16 hp @ 1800
rpm max Still works
great 29 years later! |
|
The crankshaft
was turned 0.010” under size (both mains and crank journals), and new
bearings were installed The engine was
bored 0.072” over size to accept universal Atomic 4 pistons (0.01” over
size). This was done
because over size pistons were not available for this displacement
engine. New bushings were installed
in the wrist pin end of the connecting rod and bored to accept the Atomic 4
wrist pins. The camshaft
bearings were replaced; four new exhaust valves were installed and all valves
were reseated. The generator
was used as a power take-off to drive the existing water pump and a new
65-amp, 12-volt alternator at 4 times crankshaft speed. (The system was 6 volt previously). The field winding, brushes, etc. were
removed from the generator. The
flywheel-to-generator power take-off is driven by 2 V-belts, and the
generator-to-alternator take-off is driven by a timing belt. The water pump is driven directly by the
generator power take-off. The starter is
the original 6-volt, which cranks the engine faster with the 12-volt
system.
| ||
|
The original |
||||
|
|
|
|
||
