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Mercruiser Alpha One Stern Drive Insert Screen - Port

Port Side Outdrive Lower Unit Insert Screen

  • GLM P/N 21880
  • Replaces Mercury OEM 93424-1
  • Installed into the left (port) side of the lower unit
  • Plastic insert screen compatible with MR / Alpha 1 up to 1990 only

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21880 port screen

21880 port screen

P/N 21880 Insert (port) $4.29

Customers who ordered P/N 21880 also purchased:

87510 Seal Kit 26-33144A2
87510 Seal Kit 26-33144A2

P/N 87510 Seal and gasket it for the Mercruiser lower unit. Compatible with 1970 - 1990 models. Replaces OEM 26-33144A2. $35.15

39622 Bell Housing Gasket 27-94996A2
39622 Bell Housing Gasket 27-94996A2

P/N 39622 Gasket kit - fits between the outdrive and bell housing. Use gasket sealing compound (available below) on both sides of gasket. Replaces OEM 27-94996A2. $6.15

317201 Large Sealant-Johnson
317201 Large Sealant-Johnson

P/N 317201 Large gasket sealant (includes brush inside lid). 16 ounce. $24.15
*Smaller size also available