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PHDIII · 07-18-2011, 09:45 AM

If you have a Mercruiser Alpha Outdrive, the speed sensor is located within the out drive and won't be visible. The sensor hole is located in the leading edge of the out drive just above the nose of the gear train. This inlet hole is for water pressure to provide input as to speed. Clean out this hole carefully with a 1/8 inch drill bit--hand twist only.

07-18-2011, 09:45 AM	#2
PHDIII Member Join Date: May 2004 Posts: 36 Thanks: 0 Thanked 6 Times in 5 Posts	Pitot Tube If you have a Mercruiser Alpha Outdrive, the speed sensor is located within the out drive and won't be visible. The sensor hole is located in the leading edge of the out drive just above the nose of the gear train. This inlet hole is for water pressure to provide input as to speed. Clean out this hole carefully with a 1/8 inch drill bit--hand twist only.