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    1979 Evinrude 4hp gear oil and cooling?

    Model 4932D. Std. lower end (not weedless). My other lower ends have an oil vent and fill hole and I fill it from the bottom until it comes out the upper vent hole. This little guy only has one hole. Do you know what the procedure is? Does it take normal 80W-90 lube? I read some some of these...
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    Temporary tachometer

    Any advice for buying a temporary tachometer for tuning? (Tiny Tach, etc.) 3 cyl. Merc. 2-stroke None of my gauges work but I don't have time to deal with all of that right now.
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    Crappy hose

    My engine wouldn't go full throttle. It would just bog. I changed the fuel/water filter and noticed a few small chunks of what looked like clear plastic hose. So I changed the fuel hoses and primer bulb. It still bogged so I figured maybe that crap also got into the carbs. so I spent 6 hours...
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    Which spark plug? (confused by EzPartsWeb)

    I have a 1991? Mercury 70hp 3 cyl. Serial # 07187815. The EzPatsWeb says either AC#V40FFM or Champion#QL-76V The ones that are in it are NGK#BUHW. Are these all the same plug? And I thought the "newer" mercs ran BUHW-2 (wider gap). Opinions?
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    Enough horsepower?

    I've got a 1993 Hurricane deck boat that's 17'6" and 1,670 lbs. It has a 2-stroke 70hp outboard on it. It will plane with 2 people on board but not with 3. It can take up to 140hp. I have a chance to trade my 70hp even for a 110hp with a guy that says he wants a smaller engine on his bass boat...
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    Throttle cable connector part # ?

    Was fishing the other day and decided to fire up and move to another part of the lake. I moved the lever forward and it did nothing. The engine just sat there idling. Tried reverse. Same thing. I opened the engine cowl and both cables were disconnected. I don't know why the shift lever came end...
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    Faulty fuel sender or fuel gauge?

    The fuel gauge on my boat wasn't working when I bought it. I got through last summer fine without it but it would be nice to have it working. Replacing the gauge or wires would certainly be easier than the sending unit. How to test if the gauge or wires are the problem? If it is the sending...
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    135 Black Max opinions?

    I'm considering buying one of these cheap/not running and rebuilding it. It's a '93. I'm told it was run on straight gas. Supposedly it turns over but 2 pistons/cylinders got hot. I guess that since it didn't lock up then the crank should be ok. So, in theory, I would just need to clean up all...
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    Stand-alone tilt/trim pump

    I'm not sure if this pump is specific to Mercury or is generic since it's on board and not on the engine. It runs to a 1980's 70hp Mecury outboard. The pump motor still runs but I started having no trim/tilt and no reverse lock (related?). There is some clear oil on the floor under the pump. I'm...
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    No spark on 2 of 4 cylinders

    The top 2 have no spark. All 4 coils test good with similar readings. The 2 with no spark share the same ground but I undid it and it looks/seems fine. Mercury Classic 50 #0A959445 What next?
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    Classic 50 fuel pump?

    Trying to figure out why this engine won’t rev. I suspect the fuel pump. But I don’t see one. Do these not have one or is it somehow located in the block under where the quick fuel connector comes into the lower cowl?
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    Portable tank vent ? Connector?

    I have a metal 5 gal. tank that has a cap like a car's radiator and a quick connect fitting. When I have loosened the cap there can be a lot of pressure (or vacuum?) released. Is that normal? How are these tanks supposed to vent? Is it through the quick connect fitting? I had cleaned the carbs...
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    Classic 50 not returning to idle

    I'm chipping away at trying to get this old girl running right. When I lift the high idle lever and then put it back down the throttle pivot mechanism doesn't return to low idle. I can push it back that 1/4" or so with my hand with no trouble at the engine. The pivot mechanism all seems to be...
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    Plug gap for BUHW-2 / 5626 plugs on 1986 Classic 50

    I searched but wasn't able to dig this up. Gap spec. would be greatly appreciated.
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    Classic 50 levers/controls.

    Had stiff remote controls. Lubed the cables. Still stiff. Seems to be at the engine. Advice for next step, please? (see video) Video: https://drive.google.com/file/d/1cSrP4DiRaVrc5xhPmzd0qWxIUOxPlVy-/view?usp=sharing
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    Starter/solenoid help

    No starter action. Bought a new solenoid (4-pole). No action. If I put my booster pack to the small solenoid poles it clicks and opens the circuit and the starter turns the engine. If I connect my multimeter to the wire coming from the key switch and turn the key to crank my meter reads 12.6v If...
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    Mercury Classic 50 serial number not found at Mercury website

    Hi. Newb here. Thanks for having me. I have a Classic 50. I believe it's a 1986. I went to Mercury website to confirm and the serial # says "not found". Same result when I search at the parts sites. The serial # on the mount and freeze plug both say A959445. What the heck?
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