Recent content by footer

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    aftermarket 0.020" pistons for 1979 200 Merc

    Hi everybody, it's been a while since I have posted about my merc troubles. I have a 1979 200 Merc that had the #2 piston disintegrate and fuse to the head. I have decked the head 0.010" at my tool & die shop on a CNC mill and then ground the surface clean on a surface grinder. The head looks...
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    TMD, how do I release the main bearing cradle for the powerhead?

    Hi TMD, footer here. Have a question for you. I am pulling the main bearing cradle on my 200 Merc.<br />I have all of the main cap bolts out, and all of the external mounting bolts. The crank seal and flywheel mount/balancer has been removed. I have the cradle cracked free from the powerhead...
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    TMD, Footer Here... pistons in '79 200 Merc have 0.020 stamped in to the top of

    Does this mean that these are twenty thou over pistons in this 200 and the p/h has been over bored already? If so, how much more can you take down the cylinder sleeves before you, A: run into cooling problems, or B: run out of piston/oversize ring options. Can I at least pray that I might be...
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    TMD, is there a difference between a '79 200 Merc cylinder head and a 150 or 175

    Hi everybody, just wondering if the cylinder heads are the same on a 150 - 200 hp black max for '79 and the stroke is the only difference? I'm not sure if the bore is larger or not, probably due to displacement increases. Any thoughts would be great guys.<br /><br />Cheers,<br /><br />FOOTER
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    Anybody hear of Marine Nitrous Oxide for Outboards?

    Hey everybody, I was watching Monster Garage last night and Jesse & the boys were making a Shark Boat. One of the toys was a new 225 hp Honda 4 stroke. One of the marine specialists added a NOS system to it. I realize this is a 4 stroke, fuel injected engine, but here is my question for the...
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    Marine Doc, blown #2 piston in 200 Black Max

    Hi Doc, footer again... I pulled the cylinder head on my '79 200 and right away the head was not sealed well... When I got it off, the top 1/8th of the piston looked like it was shot peened into the combustion chamber and remaining portion of the piston is down in the cylinder sleeve. Upon...
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    Marine Doc, Help!! 1979 200 Merc BM head bolt torque spec

    Hi Doc, hope you have a second to help me. I have misplaced my shop manual and need to change the HG's on my 1979 200 Merc Black Max. SN 5014582. Can you tell me the ft/lbs torque spec for the head bolts? When I ordered the gaskets I was told there were 2 options and I wasn't given a...
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    1979 200 HP Mercury Black Max sudden drop in RPM/Torque

    Hey everybody some pretty good insight in this forum, by some folks with allot of experience. Here's one for you. I have an 18ft Super Sidewinder with a '79 200 Black Max, propped with a 19 pitch SS high five. I primarily use this boat for barefooting and slalom skiing, so hole shot and mid...
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