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MerCruiser 140hp 3.0L .030" Oversize Pistons 4cyl 1491H-030 Silv-O-Lite 1972-89

MerCruiser 140hp 3.0L .030" Oversize Pistons 4cyl 1491H-030 Silv-O-Lite 1972-89
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MerCruiser 140hp 3.0L .030" Oversize Pistons 4cyl 1491H-030 Silv-O-Lite 1972-89 MerCruiser 140hp 3.0L .030" Oversize Pistons 4cyl 1491H-030 Silv-O-Lite 1972-89 MerCruiser 140hp 3.0L .030" Oversize Pistons 4cyl 1491H-030 Silv-O-Lite 1972-89 MerCruiser 140hp 3.0L .030" Oversize Pistons 4cyl 1491H-030 Silv-O-Lite 1972-89 MerCruiser 140hp 3.0L .030" Oversize Pistons 4cyl 1491H-030 Silv-O-Lite 1972-89 MerCruiser 140hp 3.0L .030" Oversize Pistons 4cyl 1491H-030 Silv-O-Lite 1972-89 MerCruiser 140hp 3.0L .030" Oversize Pistons 4cyl 1491H-030 Silv-O-Lite 1972-89 MerCruiser 140hp 3.0L .030" Oversize Pistons 4cyl 1491H-030 Silv-O-Lite 1972-89 MerCruiser 140hp 3.0L .030" Oversize Pistons 4cyl 1491H-030 Silv-O-Lite 1972-89 MerCruiser 140hp 3.0L .030" Oversize Pistons 4cyl 1491H-030 Silv-O-Lite 1972-89
$ 140.00
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Part Number(s) Included

  • Silv-O-Lite Cast Dish Pistons 1491H-030 (0.030" Oversize) Piston & Pin Assembly (Set of 4 As Pictured) - THESE ARE 0.030" OVERSIZE PISTONS
    • You can get all of the information in Silv-O-Lite's catalog (Page 87)
  • Connecting Rods (also included as pictured) and I'd imagine they are still the OEM GM ones from the 1972-1989 time period

General Application / Compatibility

  • These were from a mid MerCruiser 3.0L 140hp 181CID
    • These would apply to the 1972-1989 time period as GM switched to a flat top piston in 1990
    • (RELATED OEM STANDARD SIZED PISTON NUMBERS)
      • 733-3819 / GM 3963663 / OMC 980503 (Standard)
      • 733-3818 / 18-4160 / 980504 (.020 Oversize)

Other Details

  • Freshwater Used Parts
  • Overall Good Condition!

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