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Mercruiser Alpha One Outdrive Insert Screen

Mercruiser Stern Drive Lower Unit Starboard Insert Screen

  • GLM P/N 21870 replaces OEM 93423-1
  • Compatible with the MC-1, R, MR and Alpha Gen 1 models up to 1990
  • Port and starboard sides available

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21870 Insert Screen Alpha One 93423-1
21870 Insert Screen Alpha One 93423-1

P/N 21870 Insert (stbd) $4.29

Customers who ordered P/N 21870 also purchased:

21880
21880 Port Mercruiser Lower Unit 93424-1

P/N 21880 Port side - insert screen. Compatible with 1970 - 1990 models. Replaces OEM 21880. $4.15

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

P/N 87510 complete gasket and seal kit for the 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 Stern drive bell housing gasket kit. Make sure to use a gasket sealing compound (available below). Replaces OEM 27-94996A2. $6.15

317201 Large Sealant-Johnson
317201 Large Sealant-Johnson

P/N 508235 Small gasket sealant 4 ounce. $19.15

P/N 317201 Large gasket sealant (includes brush inside lid). 16 ounce. $24.15