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The long one is only found on MerCruiser GM V8 305 5
Heat Exchanger: 378727
Superseded to OMC 984161 / 0984161 (which is equivalent to this)
For the most part it seems these parts were used from 1976-1982 on 470 models that used a 3" Heat exchanger ****(not the larger 4" model)****
59340 Rocker Valve Arm Stud Ball Unit
Johnson Evinrude 0378240 Speedifour 75hp V4 Wiring Wire Harness Cable 1963 Trim & Tilt Wiring Harness The long one is onlyPart Number(s) Included We're pretty sure this is a 1963 OMC Johnson Evinrude 378240 378240 Wiring harness. General Application Compatibility Probably the 1961 1963 Models only (75hp & probably 90hp) as the 64 & Up models had more quick connectors and this only seems to have one total. The 1961 & 1962 models also had some quick connectors and this could possibly be adapted to work with those models as well. They used the white Flat Plug Connectors on
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