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    Another winterize question

    If there is a heat exchanger isn't that Closed cooling and draining the block would drain EG antifreeze?
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    Alpha 1 Gen 2 leaking seal

    So i did the impeller today and I always pressure test drive after. 9 psi for 5 min and 15 psi for 15 min turning the shafts after times up. After the 15 psi test I saw the gauge drop a little moving the drive shaft and heard a little bubbling from the cavity where the drive shaft and water...
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    4.3 low compression

    I know there is a lot of this out there and was hoping not to join the club but here I am. During summerizing today I ran a compression test per Merc bulletin 97-25 revision June 1999. My engine is 0L323711, a 1999 4.3. I did the test WOT, engine room temp as it said ( I thought it should be...
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    How much water to crack a 4.3 block

    Just now getting to my boat for the summer unfortunately. When I winterized last year I decided to go the no anti-freeze route for the first time. I did drain all plugs, poked around for a while and left plugs out for a while. Did the recirc hose to. The engine was as level as I could get...
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    Merc 2 Barrel Carb tuning

    Its on a 4.3 0L323711. Everything runs great as of winterizing last year. During the winterization and oil change I was getting run-on after turning the key off. I thought maybe it was bad gas as it was getting close to a year old (treated). Well I started it up this year on muffs with fresh gas...
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    Shift bellows install question

    So I just finished my bellows job. I think all is well but seeing the length on the shift bellows is getting me. In sure I'm thinking to much but the book 14 says 2.5" from Bell housing. How does one measure that. Right now I have the end of the bellows about halfway up the cable between the...
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    One more bellows question (gear lube hose)

    I am attempting my first bellows change on a alpha one gen 2. Using manual #14 as I guide I see it never mentions what to do with the gear lube hose. It seems like it has a high chance of snapping the threw transom connection if not cut right away. So if I understand correctly I should cut...
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    Winterizing and fuel question

    So I didn't get to use my boat as much as I wanted to this year, it still has about half tank of gas from last Sep. 2017. The fuel is treated with Sta*** 360 Marine. I already drained the water in block, manifolds and drive thinking I could get another outing in but looks like its not gonna...
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    Is this a problem (Pics)

    I finally got back to the boat and got the drive off. Good news was not a single drop of water inside any part of the drive.:D Now the strange part, I checked everything, re-greased and put drive back on. I torqued the 6 nuts in a X pattern then middle 2, repeat a couple times and then torque to...
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    Is this a problem (Pics)

    As I was putting the boat away after this last time out, I noticed the bell housing gasket is pushing out on the top and on the starboard side. I didn't notice this when I put the drive on after the winter. The boat has only been in the water twice since drive wen't back on this year. It is a...
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    Please tell me I'm Stupid for asking this.

    Well it got you attention. I was tracking down a fuel gauge problem. Cleaned contacts to brand new. Figured since I have gone this far I should pull the sender and make sure its giving correct reading. Well in doing so a little junk got in the tank. Small parts of grime from around sender and...
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    What impeller do I have

    That serial comes back as a Alpha 1 Gen 2 drive. You should be able to just type that into Google adding "impeller kit" to it and have lots of choices. Achris vidoes on YouTube are great for learning how to do it the right way. Here is the iboats link for Serria part...
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    First start sanity check

    I finally got around to pulling the boat out of its storage shed. I got the boat late 2016 and had it winterized right after I got possession. First start of 2017 season showed water coming into oil. Problem identified and corrected. (thanks batwing manifolds) Unfortunately due to life I only...
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    Alpha One Gen 2 Service Question

    I was doing my layup work on my drive, new impeller, lube change etc. When I was putting the drive back together I noticed that upper rubber sleeve on the shift shaft has a very small crack in it. I might be using the wrong terms, I am trying to describe the rubber part you can see on the lower...
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    Sorry, Another Winterization Thread

    Hello All, I apologize in advance but would rather ask questions now then start a how to replace parts posting in a few months. ;) I have a 99 4.3L Carb Gen+ (0L323711). I also have a heated shop I can work in but not keep the boat in all winter. My overall plan is to store the boat with the...
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    First time Impeller change Questions

    Hello, I am changing my impeller for the first time and purchased the Quicksilver kit(817275Q05) you see below. I was expecting the kit to come with the one piece gasket(86683301) but came with the 3 pieces. I have the locating pins so I am not to concerned with that. I would like to know that...
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    Strange Tach Problem

    Hello everyone, Thanks to everyone's help here I converted my 4.3 1 piece manifolds to 2 piece. I even replaced the shutters since I was in there. I ran the boat on muffs today for the first time and appears no more water was entering the oil. Before even after a 10 minute run on muffs I would...
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    Running Alpha 2 in a Tub.

    Hello Everyone, I have a 4.3 with alpha 1 Gen 2 on it. After the first start of the summer (on muffs), I had water in oil, after help from on here, I changed the oil and tried again, still got water in the oil. We assumed it was the manifolds (original batwings), when I took them off I found...
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    Possible cracked block, need help troubleshooting.

    Hello Everyone, Purchased my boat last year at the end of the season. Engine is a '99 Mercruiser 4.3L w/ Alpha 1 Gen 2 (0L323711) 225 hours. Ran it before winterizing and no problems. Had local marine do the winterizing, oil change and compression test. I was told oil came out clean...
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    Riser Temp Question

    Hello All, I just started my boat for the first time this year. Its a '99 4.3L with Alpha 1 Gen 2 (0L323711). Good news is it fired right up without much fuss. Ran smooth and everything else checked out. My only concern is after about 15-20 minutes running all under 1500rpm, the port riser...
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