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    Stern Drive, Trilux and Prevale Sprayer

    I was starting to gather various bits I will need for next spring's commissioning. I noticed that the price of a spray can of Trilux antifouling paint is quite high compared to the price of Trilux in a can. I was wondering if anyone here has tried spraying the can version with those...
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    Seal Kit orientation

    I'm about to tackle this same job and glad to have found this thread since I did not know about the single seal change. Is there a proper orientation to the single seal? i.e. rcorrect side to put up? Thanks
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    Is This a Coupling Failure... Or My Error?

    Is This a Coupling Failure... Or My Error? 3.0L 4 cyl with Alpha 1 G2 drives, abut 250 hours total, over 9 (short) seasons. Twins. I took off the port outdrive to do an over-due transom reseal. The gimbal bearing was smooth, well greased, and no water in bellows, so decided it did not need...
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    Engine Pre-Alingment (rough alignment) Tool for Alpha 1 G 2

    The drive shaft coupling on the back of the engine and the center of the gimbal bearing must be precisely alinged or you will ruin the coupling. Replacing the coupling requires removing the engine from the boat. The manual calls for using a special Mercruiser alignment tool that inserts through...
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    4.3L single point drain; New water pump on engine, now temp gage doesn't read

    I changed out the on-engine wtaer pump on a 4.3L MPI engine with a single point drain. After re-starting the engine running on the muffs it ran well, didn't overheat, cool water in the inlet hoses at the water pump, warm water out the outdrive showing engine cooling was taking place, but no...
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    Anyone know the specs on the bolt to hold the crank sensor in on 4.3L ?

    Took the crank position sensor out and lost the bolt (not me, but now it is my problem.) If anyone knows what the specs are on that bolt it would save me some fumbling around in the bilge figuring it out by trial and error. Mechanic wants to order OEM part from Mercruiser dealer... about ten...
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    3.0L AlphaG2 strange leak question

    On the inside of the transom, at the very lowest part of the transom shield on the inside of the boat I have a slow seaping leak. I mostly know it is there because of the streak of rust it creates. I thought this might be a leaky u-joint bellows or attendant leaks into the u-joint bellows...
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    .4.3L MPI questions

    My family has a boat with a 4.3L MPI engine with alpha outdrive. It has been running well all season though I personally haven't driven it for 20 years or more. On the day in question it ran great for an hour or so, then we stopped and spent a few hours on the beach. Then absolutley dead...
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    3.0L twin engines; differnent manifolds, interchangeable?

    Hi, I have twin 3.0L motors in my boat. Manifolds and risers were overdue for inspection, so I bought 1 manifold and 1 riser and started on the stbd side. The manifold looked good; replaced the riser and bought a second riser for the port side to do same. Today I noticed for the first time the...
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    speedi sleeve on yoke question

    About to put a speedi sleeve on my yoke. The sleeve will start out a little too long. Then after it is mostly on I will remove the radiused end per instrctions. At that stage how do I go about getting it a little further down onto the flat of the shaft? Can I just tap it down working around the...
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    Shift Cable End Gude in Bell housing Spins but Won't Come Out

    I'm working on my Alpha 1 Gen 2 shift cable. I got the special tool to remove the cable end guide in the bell housing. The tool (Mallory) promptly broke with almost no torque at all, so I chased around for a day and found some one to weld it back together. Then the brass nut seemed to break...
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    Upper Shift Shaft Seal help, New Loose Twin Seal Style

    Alpha 1 Gen 2 circa 2005 I have a leak in my shift cable and upon pulling the upper shift shaft it is clear why: There is a deep score on that shaft right where it goes through the seals. So I ordered new seal kit and a new shift shaft. My problem is I can't seem to find clear instructions as...
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    Best way to flush an Alpha I Gen II leg?

    HI, I had a seal go on my Alpha 1 Gen II leg letting a small amount of water enter the gearbox. Fortunately I caught this early. I found the compromised seal and replaced it/ pressure tested etc... Now I'm having a devil of a time getting the last of the water-contaminated drive oil out of the...
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    Brand New Merc 3.0 Riser Arrived With Rough Finish, Are they all like this now?

    HI, Time to do risers and manifolds on my 3.0L Mercruiser. I bought OEM kits for both the manifold and the riser. They arrived Friday afternoon. Upon unpacking the brand new factory OEM riser elbow the outer surface finish on the riser elbow is VERY rough. A coarse sand-like texture left from...
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    Gimbal Bearing U-Joint Bellows Replace: First Timer; Advice Requested

    I pulled my drive leg and found some signs of water intrusion into the U-joint bellows. No water entered the boat (sits on a mooring) and U-joints were not rusted, so the intrusion was minor, but enough to pooch the gimbal bearing. It looks like cooling water got in where the raw water port...
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    Merc 25 BigFoot Shift Disconnect Info; water pump lower unit removal

    I recently had to do a water pump on a Merc 25 Bigfoot 4 stroke outboard. It has an unusual shift disconnect to remove the lower unit. LOTS of people ask this question over and over: "How do I disconnect the shift linkage to remove the lower unit on a Mercury BigFoot 25 4 stroke?" I searched by...
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