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    Identifying and replacing engine block

    I have a Mercruiser 140 GM 181 I/L4 1968-1972 Serial # 2770077 that has a cracked block and I would like to find a replacement from a scrap yard or elsewhere if possible. Does anyone know what vehicles this motor was run in and how do I find that out for myself in the future?
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    Power Steering Merc 185

    Hey Guys, I'm working on this Merc 185 Serial # 6330183. When I got it the power steering hoses were disconnected and to me the manual is unclear as to how they reattach. From the pump cooler underneath the motor on the port side I see that the low pressure hose runs from the fitting on the...
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    Mercruiser 185hp manual/headgasket info

    1984 Mercruiser 185 3.8L V6 229 CID Serial 6691470 Does someone have the manual for this I can take a peek at please? I'm just about to put the heads back on, anyone have any additional tips on the procedure that the manual may not contain? The first last time I did head gaskets I did...
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    Matching up a new used block Merc 185 (3.8L Gm 229CID)

    1984 Mercruiser 185 Serial # 6691470 GM V6 3.8L 229 cid Cracked block, decided to replace it vs epoxy, but I'm having difficulties matching one up. From what I read the 229 cid was only used from 1980-84 which would make sense, but haven't been able to find one locally. However, I read that the...
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    You'll never guess....another cracked block. Merc 185

    Good day all! Hey I bet you never heard this one before....cracked block. It's a 1984ish Mercruiser V6 185hp Serial# 6691470, the history is it sat in a garage for about 4 years and when it was brought to me it still had water in it. The oil came out sludgy w/ a little bit of milk to it. Found...
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    Malibu Gm Vortex...Where to start?

    Gonna be getting me a new project and I'm already full of questions including whether or not am I even in the right forum? I have a Malibu owner manual which is worth poop. The engine says "GM vortex" and then just malibu on the exhaust manifolds, would this be an Indmar motor? The plate is none...
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    I just don't get it....at a complete loss

    Merc 4.3LX with Thunderbolt IV serial# OFOO4..... Idles great, very smooth, give it gas all it does is backfire before it hits 2500 rpm. This is what i've done so far: Rewired harness rebuilt carb did tune up and timing checked compression changed exhaust manifold gaskets replaced fuel pump...
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    Drive won't go down, unnecessary reverse lock?

    I have a boat that's a mutt, bits and pieces from all over and I can't tell which model of trim pump I have the numbers are worn off. It has a squarish base to it and it's metal, not plastic. If I rememer right, the boat that I pulled this out of had the linear style sender and the trim plate...
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    Purple/yellow wire for fuel pump, no post on the starter?

    Hey guys, on the Mercruiser 4.3LX IVThunderbolt the wiring diagram say that the purple w/yellow strip wire that runs from both the fuel pump and the oil pressure switch runs to the starboard post on the starter (opposite the solenoid post). On this starter, there is no 3rd post, only the main...
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    Power Trim turning me into a lunatic, reverse lock valve leak.

    I think I am just gonna start lifting the drive with a rope....good hell. So this is an approx 1980 Merc 140, has the single solenoid metal prestolite pump w/ rotary style trim sender and interupter. The cylinders had to be completely drained and a few of the hoses have been replaced, I feel...
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    Merc140hp GM 181 I/L4 1979-1982 Manual Please?

    I have the 1972-1977 all engines manual, but it's missing a couple of updated items that I could use for this motor. Does someone have one handy I can get. Serial# 6283099 Much Thanks!
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    Wish my boat wasn't painted (stripping paint off gel-coat?)

    Hey Gents...So I have this Crestliner that was painted by the guy I bought it from and I wish it wasn't really. He did an ok job but I would have much rathered he left it be and I had a chance to just buff out the old gel coat. I doubt I'll ever do it but I was wondering if anyone has ever...
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    Merc 270 (2 BBL.) GM 350 V-8 1969-1972

    Hey I was wondering if anyone in there travels has happened across a journaled gathering of information containing everything there is to know about this motor so that I can reference it if ever I stubble across a problem? Anyone ever come across such a neatly organized document? Meanwhile, I...
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    MCM 140 EST Ignition question/diagram

    Gentlemen, I have a MCM 140 #6156174 and it has an EST distributer/coil system on it. I'm not really familiar with these, I am hoping it's gonna make my life easier in the long run, but it looks like I have a little learning curve to conquer first. I'm having an issue getting the wiring...
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    95' Merc 4.3 LX IV Alpha One Starting/Wiring Issue

    Have a Lake Powell trip planned in a day so I hope someone can help me with this. I got a 95' Chaparral with a Mercruiser V6 4.3L LX Alpha One IV Serial # 0F3636*** Manual #18. It cranks but won't start, occasionally I get a backfire. There are a few wires that are not connected in the engine...
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    Manual? Merc 4.3L V6 #0F363142

    Does anyone have the link to the manual for this? I greatly appreciate it! 95' Chapelle Mercruiser 4.3L V6 #0F363142 Alpha One # 0F341390 Transom # 0F402580 Cheers!
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    Sunk!

    Had an interesting day. The wife rolled the 98' Seadoo GTX, right after we finally got it running of course :facepalm: It's all good though, it happens. The part that pissed me off was not only did not one person stop to help us (I had my 3 year old daughter with us at the time btw)but the...
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    Wagner Velvet Drive...Drive Shaft Spun Off!?

    Working on a Mercruiser 350 with a Borg-Wagner Velvet Drive # 1017004. It's a friends boat, he just bought it, 2nd day out it won't go into gear....just growls. Gets towed back and I enter the picture. Upon arrival I notice that the prop is actually touch the steering plate or rudder (not sure...
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    Smokes like hell...01' Seadoo GTI

    Seems as though there is a hole somewhere in the exhaust system, but I can't be sure without tearing it apart. I was hoping maybe someone has some knowledge they can share that will save me some diag time. It runs good on th trailer, but that has always been with the seats off, it seems as...
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    2001 Seadoo GTI starting issue

    Got a 01' SeaDoo GTI that has been giving me a headache and I'm hoping someone could help lead me in the right direction. So when I plug in the key it does the normal beep, then 50/50 when I push the starter it either warning beeps even louder and won't crank or cranks very sluggishly. The...
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