MerCruiser
3.0L TKS Alpha I (One) (135-hp)

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3.0L TKS Alpha I (One) (135-hp)
Whether you want to pull the kids around on water toys all day or host an all-day cruise on your pontoon, the 3.0L has all the power you need. Available with power steering and coupled with our time-tested Alpha drive, it is one of the lightest, most dependable and fuel-efficient engines in its class—and one of our more popular models.

Fast Facts
Propshaft HP	135-hp
Configuration	Inline-4
Aspiration	Natural
Displacement	3.0 L / 181 CID
Bore & Stroke	4.00
Fuel System	2V Carb with Turn Key Start & Mechanical Fuel Pump
Base Engine Weight	635 lbs.
Length/Width/Height	29 x 26 x 21
Max RPM@WOT	4400-4800
Warranty	3-year

Key Features

Compatible Drives: Alpha
The single-point manual water drain system with built-in flush attachment that provides a convenient means for draining water to prevent freeze damage
70-amp alternator to handle the demands of today’s state-of-the-art electronic components.
Heavy-duty shafts and bearings that can handle even the harshest marine environments.
Power Trim XD with hydraulic memory that returns the drive to the preset trim position if it comes into contact with underwater objects.
Exclusive greasable drive coupler that is accessible from within the boat, reducing the amount of time your boat is out of the water during routine ma
Exclusive drive lube monitor conveniently located atop the engine for easy access.
Antifeedback power steering that provides smooth steering control.
Compact hydraulic steering available for pontoon applications, which is offered as a factory-installed option on the Alpha drive packages.

Boats Tested with this Engine
Bayliner 175 Bowrider
Bayliner 175 Bowrider (2009-)
Four Winns H170 (Not in Production)
Maxum 1800 MX
Sea Ray 176 Bowrider
Sea Ray 176 SRX
Bayliner 185 Bowrider
Bayliner 185 Bowrider (2009-)
Sea Ray 180 Sport
Sea Ray 185 Sport (2006-)
Tahoe Q4 Sport Fish (2007- )
Bayliner 195 Classic (2006-) (Not in Production)
Bayliner 195 Classic Bowrider (Not in Production)
Rinker 192 Captiva BR (2002-2004)
Tahoe Q4 SF (2004- )
Boston Whaler 23 Outrage

MerCruiser 3.0L TKS Alpha I (One) (135-hp)
Propshaft HP	135-hp
Max RPM@WOT	4400-4800
Dry Weight	635 lbs.
Length/Width/Height(in)	29 x 26 x 21
Displacement (liters/cu.in)	3.0 L / 181 CID
Aspiration	Natural
Cylinders/Configuration	Inline-4
Bore & Stroke	4.00
Alternator Output Rating	65 amp
Fuel Type	Gasoline
Fuel System	2V Carb with Turn Key Start & Mechanical Fuel Pump
Exhaust System	Iron Manifold with EDP Coating
Ignition System	EST Analog with Distributor
Cooling System	Thermostatically Controlled, Raw Water
Electronic Engine Display	No


MerCruiser 3.0L TKS Alpha I (One) (135-hp) Turn Key Starting system is standard on all carbureted engines. This patented feature eliminates the hassle of starting a cold engine. Simply turn the key. No choke, no pumping or priming required.

Have you used this engine? Give us your feedback/comments.

M,Hubbs

10/27/2009 9:23:41 PM

Hi, According to this video, this engine/boat (3.0L MerCruiser) is supposed to have the bilge drain plug hooked up to the oil drain hose. My 2007 Bayliner does not have this--the bilge drain plug does not hook-up to anything. I went to the local MerCruiser service center and looked in the manual and did not see any kind of drain plug that you could attach a lanyard or wire to. Does anyone know where this drain plug can be found?Thank you,Mark in Dallas

M,Hubbs	10/26/2009 10:31:43 PM
Hi, I just changed the oil on it. The owner's manual said to pump out the oil in the dipstick shaft. I did. I got a little, about 1 - 2 ounces. Your video says this is not necessary. It also says that the only place you need to drain it is through the blue hoses. That is good. In general, I like this engine. I bought the boat, a 2007 Bayliner with the 3.0L Mercruiser on Feb. 27, 2009.

m. someone	6/11/2009 12:29:28 AM
Could someone tell me part number for the starter for this engine, thanksmdarr@ swbell.net

M. Kilham	8/25/2008 7:50:54 AM
Good evening. I am trying to access the Understanding Electrical Systems video but it does not seem to be working. All others are fine.Many thanks,Michael.

B. Annequin	6/27/2008 10:34:28 PM
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Key Features

MerCruiser 3.0L TKS Alpha I (One) (135-hp)