Recent content by Themanofsteel

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    Mercury 200HP Screw Hole on Block

    I have another question. This threaded hole on the head is also opened. The other head has a value on it with a hose. Should something be here or can it remain unused?
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    Mercury 200HP Screw Hole on Block

    Ok. Thanks!
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    Mercury 200HP Screw Hole on Block

    Ok. I disconnected the oil injector and just premix. This isn’t needed then?
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    Mercury 200HP Screw Hole on Block

    I have a Mercury 200HP Outboard Blackmax Offshore 1991. There is a threaded hole at the base of the block. See picture. Exhaust comes out of here. What’s suppose to be here??
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    Mercury Outboard Blackmax 150hp Water Pump

    My water pump base shoots water out of a little hole in it. Since it’s there by design I guess it’s normal? Not sure. In the picture I circled a spot with a significant spray of water. Looks like a lot of water too lose. im asking this because I have an overheating issue.
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    Timing adjustment

    I trying to adjust the timing on my Mercury 150 outboard 1982. When adjusting the “primary pickup”, the spec say 11 ATDC. I follow all the steps in the manual, see attached photo, but the timing light shows 20 BTDC. I can’t adjust to 11 ATDC. I must be doing something wrong. Could use some help...
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    Crank but no start

    I have 150hp merc. Blackmax. Outboard. I recently had to replace the stater. While I was at it I opened up, cleaned, and inspected all three carburetors. Now I’m having starting issues. I struggle to start it. It cranks and will start but i have to crank it a lot. I Removed and inspected all...
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    Low Water Pressure. WOT Overheat.

    On my Mercury Blackmax 150 outboard, I installed a pressure gauge. At WOT pressure increases to about 20 then drop drastically to about 12-15psi and hold there. My overheat alarm eventually triggers. The impeller has been changed more than once. The poppet and all parts are new. Replaced the...
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    Engine Overheat

    I have a 1982 Blackmax Mercury 150hp. V6. I’ve replaced both Head Gaskets, and surfaced them, and Exhaust Plate I’ve replaced the Poppet Ive completely redid the impeller and housing. I replaced the Thermostats. I’ve flushed the engine with Vinegar, Slat-away and Muriatic Acid (No lectures on...
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    Replacing the Exhaust Plate Gaskets 150hp Merc 1982

    I have a 1982 Mercury 150 Outboard. Im replacing the Exhaust plate gaskets. According to the manual it says to add Loctite 271 to the bolt. Do I need to add this? If so where, to the threads or just the head of the bolts? Could I use RED gasket maker/sealer instead?
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    Weak Spark

    I have a 1982 Mercury V6 150hp outboard. Cylinder 2 is getting a weak spark. As a result I’ll not getting full power. All the other sparks are perfect. I recently replaced... • The spark wires (And I swapped wires to test them) • The spark packs (The thing the sparks wires attach to ) • The...
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    Temperature Issue Full Throttle

    I installed a 1983 mercury 150hp V6 on my Bayliner Trophy 21' bcuz the other engine blew out. It overheats at maximum/full throttle which is about 5000 rpms. I've replaced the Head Gaskets, Divider Plate Gasket, Thermostats, Impeller, Pop-it, Hoses. I inspected the water jacket and just about...
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    1983 Mercury 150hp High RPM’s overheat

    I have a new impeller, new poppet diaphragm, new thermostats, Hoses clear, yet the overheat alarms goes off at high RPMS. Water seems to be coming out of the water hole strong and steady. The engine does feel very hot to the touch. Thought it might me the sending unit which I took off of a...
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    Mercury Blackmax 150 Overheating

    Mercury 150hp 1983 My engine overheats on high throttle. The impeller is new and water is shooting out. I replaced the poppit diaphragm. I put 2 new thermostats in it. I tried removing stats and same thing. What could be the issue? Water steadily flows out of pic1 circled in red. Is that...
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    Mercury 150hp Low Power Engine

    I have a 1983 Mercury 150hp. I can’t get it to go faster than 10mph. The prop is fine. Not spun. When I throttle, it revs up, it sputters a little bit, but eventually dies. It struggles to restart after it dies. If it only runs at 10mph its fine. Starts and goes fine. If I try to go any faster...
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