How do i know if i have an alpha one outdrive

Put it in forward gear and remove six nuts is pretty much all it takes. Cited by Mercury Marine as the most popular sterndrive in the world the Alpha One outdrive system is used for single or twin engine applications.

The bellow have a life span of roughly 5 years if you use quality Merc parts.

How do i know if i have an alpha one outdrive. 3 Simple Ways To Identify Your Alpha Outdrive Gen 1 vs Gen 2 By nick June 17 2019. The Mercruiser Alpha One Generation I outdrive dating from 1972 through 1983 has a square upper gearcase cap with an eye attached to the 4 12-by-4 12-inch cap. The Alpha One dating from 1984 to 1992 has the same size upper gear case but lacks the lifting eye on top of the gear case cap.

The Alpha One Generation I outdrive is limited to engines of 300 horsepower or less. That the Mercruiser MC-1 lower unit and the Alpha One lower unit can be used with this upper gearcase. That said the replacement water pumps are not the same for both sterndrive units.

Let say you have this upper gearcase showing and your boat is years 1970 to 1983 our GLM Marine water pump kit is number 12110 how ever if the lower unit was replaced with the newer Alpha. Sometimes the best or only way to tell exactly what drive unit you have is to do a partial disassembly of the unit. If you seperate the upper from the lower then you can tell if the drive is an Alpha or a R drive.

The verticle driveshaft of a pre-Alpha R or number one drive has a pin at the top. Using your serial number it looks like you have yourself a MERCRUISER - ALPHA 1988 Serial No. 90-99964 Try having a look inside this downloadable link to help you with your visual ID of the stern drive.

Alpha One drives on the other hand use one stud visible on either side. Alpha Ones have two studs under the ventilation plate just above the prop. Alpha Gen II drives do NOT have two studs with nuts above the prop.

Alpha Generation II drives started production is 1991. At that time boat manufacturers would use either depending on stock. A note about RATIOS.

One noticeable difference between the Alpha Gen 1 Gen 2 Sterndrives is the shift lever as shown in Figure 2. The old style brass shift lever will not engage in the Generation 2 Transom Assembly and therefore prevents installing an Alpha Generation 1 Sterndrive on the Alpha Gen 2 Transom AssemblyRead More. TRIM CYLINDER MOUNTING PADS.

If you have an older style prop with the rubber hub it is a little harder to tell but remove the prop and see if it looks okay. Newer style props have a plastic hub. Those are very easy to see if they are in good shape.

Have been advised the gimble unit on my 1990 SeaRay 260 Mercruiser Alpha One needs replacing. I suspect the outdrive also needs some repair. Therefore would like to know the cost of a new gimble unit.

Alpha One Outdrive Most Popular Sterndrive for Power Boats. Cited by Mercury Marine as the most popular sterndrive in the world the Alpha One outdrive system is used for single or twin engine applications. The Alpha One has earned a reputation as a value-priced outdrive propulsion system that delivers reliable speed.

These factors combined make it a popular choice for budget conscious. That isnt a Bravo3 for sure. It looks like an Alpha but the anodes look like Bravo anodes.

Alswagg would probably be able to tell you for sure. I have a question I have a 92 chaparral with mercruser alpha one out drive. Yesterday I hit a log tip of prop shows ding but it wont go when I put in gear.

I pulled the boat out I put shifter in gear and I can turn prop by hand both ways maybe a little drag in the direction I have in gear not much tho. Stand the unit upright and rotate the brass shifter intermediate shift shaft clockwise looking down. 1The travel of the shifter should be from 1000 to 1200 looking down 1200 being straight ahead.

2 Roughly speaking the shifting should be center of. Sterndrive Replacement is a company unlike any other in the sale of aftermarket MerCruisers Sterndrive Alpha One Generation 1 Alpha One Generation 2 Bravo 1 our stern drive designed to replace Mercury Marines Mercruiser Alpha One R MR Gen 2 and Bravo One stern drives. MerCruiser Alpha One Gen 2 R MR and Bravo Onereplacement Outboard Mercury Johnson Evinrude and Yamaha lower.

Marine supplies boat parts and fun things for boaters. We promise the best price and customer service in the industry. I have a 2006 Mercruiser 43L engine Serila number OW614329 with a Alpha 1 outdrive.

Im trying to select a new Stainless Steel prop and need to determine the gear ratio - whether it is 162 to 181 so I can properly size the prop on your prop slsection guide. I have looked on the outdrive. Mercruisers Alpha One outdrives have been around for over 25 years and have a proven history of being reliable when they are well maintained.

Both the Alpha One MR and Alpha One Generation II are easy for owners to service with a few basic mechanical tools and a little effort. General maintenance includes. If the gimbal housing is just rotted from saltwater and has a hole in it.

Then water can get right in. Youll know it if you look at it though. Bellow jobs are a very common job.

I really dont need to see the pictures as ive done these litterally many 100s of times. The bellow have a life span of roughly 5 years if you use quality Merc parts. He is just pointing out that you already know the symptoms of a gimbal bearing going out.

Its easy to remove the drive. Put it in forward gear and remove six nuts is pretty much all it takes. As other have suggested check for water intrusion.

Person 1 is going to hold the weight of the drive and lift it up into place. As you lift it up if the driveshaft splines do not engage the upper grab the prop and give it just a little tug CCW this will turn the driveshaft. Person 2 has to align the shift lever in the front of the upper portion of the strendrive.

In this DIY feature Steve replaces the impeller in a Mercruiser Alpha One sterndrive. Not quite as easy as the Bravo 3 with its remote water pump the Alpha. R MR Alpha One Sterndrive 1983-1990 R MR Alpha One Transom Assembly 1983-1990 Alpha One SS 1986-1989 SSM II III IV V 1982-1995 Blackhawk 1994-1995 Vazer Drive Vazer Transom Alpha One Gen.

II 1991-1995 Alpha One Gen. II 1996-1997 Alpha One Gen. II 1998 Up Bravo One.

Broken outdrive anti-ventilation plate. I was removing the lower unit on my 1994 Alpha 1 Gen 2 for the first time ever this weekend new boat to me in preparation for replacing the impeller. I removed the 5 bolts but forgot about the sixth one under the anode.

I thought I had some corrosion and I read in the manual that a rubber mallet.