OEM: MERCURY MARINE 27-99777A1
- With Siamese port cylinder heads
- For : GM 153 & 181 (25 & 30L) CID engs: 120 & 140 hp (s/n 6229718 & Up)
- All Sierra parts qualify for and are covered under Sierra's industry leading customer satisfaction warranty
- With Siamese port cylinder heads
- For : GM 153 & 181 (25 & 30L) CID engs: 120 & 140 hp (s/n 6229718 & Up)
- All Sierra parts qualify for and are covered under Sierra's industry leading customer satisfaction warranty
