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    Water on top of cylinders and Oil in Exhaust Manifold.

    Seized up Merc 260 5.7L 350 CID Serial 5424302 I was planning on taking this guy down to the machine shop to have it rebuilt, but I'd like to know for sure what the culprit was before I get too froggy bout' it. So when I pulled the manifolds a nasty oil/coolant mixture came dumpin' out the of...
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    Engine Coupler

    Hey boys.... Can a seized up engine coupler restrict an engine from rotating? Working on a Merc 260 with an alpha one #5424302 and I can't turn the engine by hand at all. I got the cylinders soaking, but I was wondering meanwhile if the coupler could be the culprit.
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    1979 MCM 260 5.7L 350cid Slave Solenoid

    1979 MCM 260 5.7L 350cid Serial# 5424302 I am getting inconsistencies with part numbers and replacement with the vendors, not sure if it's my mistake or theirs. Does it matter which style of solenoid this has? The one I am replacing has the posts that are in a over/under pattern and the one...
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    Oil Pump to Distributor Shaft

    1979 MCM 260 4BBL 5.7L 350CID Serial# 5477889 Had this motor on an engine stand and when I flipped it over the oil pump to distributer shaft slide out and hit the floor. A piece of it chipped off so I have a new one coming. Is there anything specific I need to know about reinstalling the...
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    PCV Valve - Clarification of some basics

    When, if ever, should I look for a PCV valve in Mercruiser engines? Does fuel injection have anything to do with whether or not a pvc valve will be utilized? If I understand correctly most carburated GM motors use breather tubes for crankcase ventilation vs pcv valve, is this correct? I was...
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    1979 5.7l v8 350 260hp

    Good day to all the usual players.... 260 (4 BBL.) GM 350 V-8 1978-1982 Serial# 4908850 THRU 6218461 (sorry I hurt my back and can't check the exact number right this minute, but this is the range....it starts with a 54*****) I seemed to have misplaced my manual for this beast. Service manual...
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    4.3L Distributor Should this model have Thunderbolt and ignition module?

    1990 MCM 4.3L Serial #0C874052 Was this motor ever run with a points distributor? The one I have has a points distributor in it but when I look here...
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    Marine repair shop....small business start up advice.

    Hello friends. So for a year now I have been slowly doing more and more as a marine mechanic and I finally decided to just jump in with both feet and start working for myself. I just officially got my business license and while it's just me working out of my carport, work has been steady thus...
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    Safety Switch

    1968 Evinrude 85hp Model#85853A Serial#E01726 Still can't this girl to crank. Using a bump starter I connected one end to the batt post on the solenoid and the other to the yellow/red wire coming from the "S" terminal on the ignition. With bump starter engaged I don't get anything to either of...
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    Need a manual...?

    I was talking to a man about a horse whom said something concerning some files a fella' put up to help other fellas' such as yourselves in your dyi projects. Now if I were a guy looking for a little extra technical help and happen to be looking in this particular forum, I'd click on this...
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    Evinrude wiring and remote

    1968 Evinrude 85hp Model#85853A Serial#E01726 Issue: I have 3 different sets of Evinrude controls none of which have the right plug type at the end but I need to get one of them to work. Engine side has the rectangular and control side has the red round. The controls I want to use have the push...
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    Evinrude 85Hp Model#85853A Repair Manual....New to outboards assistance

    Gentlemen....Good day to you all. This Evinrude I just got needs allot of work and I could really use a manual.EDIT Evinrude 85 Speedfour Electric Start Model# 85853A Serial# E01726 Year ? (I believe this model is termed Phat 4....?) I looked at a bunch of wiring diagrams that are already...
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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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