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    87 black max hot high rpm with video

    I have an 87 black max 135 that seems to be running hot on high rpm but cools right down at lower rpm. New pump kit, poppet and stats. And help would be appreciated. https://youtu.be/0qVqIaayfw4
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    87 black max 135 alarm issues with video

    Just bought this boat and motor, didn't take a pic of the Vin sorry. Was told it has an intermittent alarm that sounds and should ignore it. I have been an i/o guy for a while and my first outboard built after the 60's. If you have time please check out the video and any input would be...
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    Alpha water pump base leak?

    Hey everyone, back again. Been chasing an overheat on plane issue from last year. Replaced the water pump base last year but when I put the hose in the pump pipe I see water spraying from the base. Take a look and let me know what you think. As always thank you for all your knowledge...
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    Alpha water pocket tube loose

    Working on the boat dropped the lower and the copper tube came out still in pump. Went to push it back into the pocket and loose as a goose. Never had this happen before. Other times the tube seemed snug in the pocket. Normal? Should there be an option ring or something to seal and...
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    Who doesn't like an overheating thread!

    I'll keep this short, 89 mercruiser 3.0 overheats after high rpm, clear tube attached no air can be seen entering system. Water pump is new, base looks a little chewed up. Hose from lower to transom replaced last year. Riser is new. When it manifold is warm front top cold bottom rear ...
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    89 merchant 3.0 oil question

    Just changed engine and kind of paranoid so sorry for the noobish question. The weight I should put in the boat 25-40 or 15-40 not the 10-30 on the automotive cap. Thanks.
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    Jumper wire needed to run power

    The coil needs to have a jump wire from batt to power side for it to run. It this just a bad solenoid? Of course it happens when my multi meter gets run over.... Nice haha
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    89 merc wiring harness diagram

    Finally got new engine in but one of the pin connectors pulled out on removal. Does anyone know which wire the gray one on the boat side of harness connect to thanks guys
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    Found this rolling around my oil pan...

    I have no clue where this could come from. Thanks in advance
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    Drill and tap 3.0 crank what size???

    Drilling and tapping another mercruiser 3.0 can't remember what size I used last time any help?
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    Manifold riser bolt size 3.0

    89 3.0 just snapped them both. Fml
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    3.0 compression check tell me I have hope

    Re: 3.0 compression check tell me I have hope Number 4
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    3.0 compression check tell me I have hope

    Re: 3.0 compression check tell me I have hope Got it off. Lookin around see what's goin on. Here is cylinder 4
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    3.0 compression check tell me I have hope

    Well boats be running rough this year and last I guess. Number 4 wasn't kicking had spark so ran a compressiontest. Hope the tool was little off. Readings in psi from 1_4. 70, 70, 90, 0. Gunna pull the head and see what's goin on. Hope I head gasket will make her happy enough. Any thoughts...
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    84 bayliner trim motor

    1984 bayliner 25 ft cuddy. Buddy just got it and won't trim down. The motor has only one solenoid. Control is the old 3 button type. Hit down the trim motor chugs along but doesn't whine like i usually hear. 12.8 volts to all the connections. Oil is full. There are only 2 lines out the bottom of...
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    Merc 2barrel carb

    Re: Merc 2barrel carb Still have the picture. Muriotic acid cleaned it right up.
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    charging issue has me at a stand still

    I have an 87 mercruiser 3.0. Noticed battery volts low when I was out the other day. They would go up to about 14v then down to 12v. At the post of alt it was at 12.8 same as battery, then sometimes way lower like 5. Figured bad connection. Took alt out cleaned connections put it back in. Now 0...
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    87 mercury 3.0 not going past 3000 rpm under load

    Hey guys always read things on here and always found my answer. I just got a 87 sebring regal cuddy with a mercury 3.0. Got her running with a new fuel pump and carb rebuild. Took her on the lake for a test run yesterday and would only do about 20mph @ 3000rpm. With out a load the engine goes no...
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    87 3.0 mercury no passing 3000rpm

    Hey guys always read things on here and always found my answer. I just got a 87 sebring regal cuddy with a mercury 3.0. Got her running with a new fuel pump and carb rebuild. Took her on the lake for a test run yesterday and would only do about 20mph @ 3000rpm. With out a load the engine goes...
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    Cant Keep Water Out Of My Lower Unit!

    OK IVE CHANGED THE WATER PUMP BASE ON MY 1970 650 4CYL 2-STROKE AND STILL GETTING MILK AFTER EVERY RUN... THE BEARING CARRIER O-RING WAS ALSO REPLACED, WHAT ELSE COULD IT BE THE ONLY THING I CAN THINK OG IS A SHIFT SHAFT SEAL, MY SELCO GREW LEGS AND RAN AWAY ANY ONE HAVE ANY THOUGHTS ON IF I AM...
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