Recent content by BrianVT

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    Old 4hp Evinrude takes a nap

    Good info. Thanks all!
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    Old 4hp Evinrude takes a nap

    I don't know how long this sat, and it looks like hell, but it had good compression so I went ahead and rebuilt the carb. It ran great in the trash barrel. I put it on a jon boat and it ran great, even at full throttle, until about 200 yds. off shore it started to bog. It ran ok at low rpms so I...
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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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    1983 Mercury 90HP outboard (3carbs) Bogs out when hot

    Lots of low-rpm running and/or excess oil mixed into the fuel can cause this. Also an obstructed air intake would cause a rich mixture. There's another thread here where a mud dauber built his home in an air intake. :-)
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    1983 Mercury 90HP outboard (3carbs) Bogs out when hot

    And my other questions? Is something wrapped around your prop. shaft? Fouled spark plug(s)? Low compression? Fuel restriction? (crap in filter or quick connector or carbs) Exhaust restriction? (carbon buildup) Coil(s) going bad?
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    1983 Mercury 90HP outboard (3carbs) Bogs out when hot

    I asked before but you didn't answer. Is the impeller peeing water normally?
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    1983 Mercury 90HP outboard (3carbs) Bogs out when hot

    It does this from the start? Or after 5 minutes? Or after an hour? You haven't cleared that up yet. Is something wrapped around your prop. shaft? Fouled spark plug(s)? Low compression? Fuel restriction? (crap in filter or quick connector or carbs) Exhaust restriction? (carbon buildup) Coil(s)...
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    115 mercury carb problems

    Sons o' bitches! I got a smoking deal on a Stihl chainsaw that a guy gave up on. You guessed it. Dobers had plugged the exhaust tube. Reamed that out and I had a like-new saw. You won't find this stuff in your repair manuals. :)
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    1983 Mercury 90HP outboard (3carbs) Bogs out when hot

    True. Going richer shouldn't hurt anything except a bit more smoke and maybe fouled plugs. But I don't think we have enough info. from this person yet to send him into doing something that he's not even familiar/confortable with.
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    1983 Mercury 90HP outboard (3carbs) Bogs out when hot

    Wait. I thought you said it was fine for about an hour? If it always bogs when you try to throttle up then we've got a whole different approach.
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    1983 Mercury 90HP outboard (3carbs) Bogs out when hot

    If it was running good before then I wouldn't mess with the jets. I only mess with jetting when dealing with major changes in altitude or air temperature. If the problem seems to be engine temperature then I'd suspect the cooling system or the coils or compression. Is the impeller peeing water...
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    1983 Mercury 90HP outboard (3carbs) Bogs out when hot

    Performance issues when hot is sometimes from the coils going bad.
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    Merc 150 Intermittently Bogging Down at WOT

    Mine is the old, all metal, push/turn type. But the concept is the same. The inside can get plugged up with crap. This may not solve the OP's problem but it's wise to check the easy/cheap things first.
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    Merc 150 Intermittently Bogging Down at WOT

    I'll 2nd that. I had a similar issue and found clear plastic shards in my filter. It was the fuel lines between the tank and the quick connector at the engine. They are known to have a clear inner liner that degrades and falls apart. I replaced them and the primer bulb. But the problem...
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