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  1. L

    Engine or lower unit making rattling sound

    We have a 1992 Searay 200 bow rider with a 5.0 Mercrusier. Ran fine all summer but the idle has always been too low and the engine would sometimes stop running at idle. Yesterday I decided to adjust it but without a tachometer. Did this by ear and looking at the dash tack and went from 450 to...
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    Gear Case Oil Fill Hole

    Can anyone tell me it this is the gear oil fill hole for a 2 hp 1939 Neptune 2A39?
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    1967 Merc 9.8 hp crappie engineering.

    Ok, I'm not trying to be an ass, but look closely at this parts diagram for a 1967 Merc 110 / 9.8. It shows the stud length is 2 & 5/16 inches long. That's the same length as the stud I removed from mine. If it was "screwed all the way in" as you say, there wouldn't be any threads sticking out...
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    1968 Merc 110 Need Help

    That's correct. My 67 had 2 yellow and a black ground wire all encased in shrink wrap, or something like that. I'm not sure what caused the insulation to desolve but most of the wire was bare and corroded green. This is what it looks like after the repair. If you look closely where the 2 yellow...
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    1968 Merc 110 Need Help

    You can rebuild that stop button. I have a 67 9.8 that I just got running again after 35 years of sitting in my dad's basement. The stop button wire insulation was completely disintegrated, the button was loose and someone had twisted it apparently trying to tighten it which wound bare wire to...
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    Neptune Alternative Carburetor?

    Does anyone know if there is an alternative carburetor that can be used on a 2hp 1939 Neptune? It's a model No 2A39 with a Tillotson MS-105A Carburetor. If not, does anyone know what size the bottom jet is? Or, what the displacement is so I can try to adapt a different carb? Any help is...
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    1939 Neptune 2A39 2 hp won't keep running

    I can only get it to run for about 2 or 3 seconds. It seems like it isn’t getting enough gas, but I’ve had both jets opened from 1 turn all the way to 4. Nothing seems to make any difference. The best run was playing with the choke once after it started. It may have ran about 5 seconds and then...
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    1967 Merc 9.8 hp Compression

    Got 85 psi compression in both cylinders, is that good? The motor runs and idles great, after getting it running with help from this forum, I just didn't get around to checking the compression until this weekend. Just wondering what the upper and lower limits are for this motor and where I'm at...
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    1939 Neptune 2A39

    Just started the restoration of my dad's 1st outboard motor. It's a 2 hp 1939 Neptune 2A39. It has good spark, and the compression is 50 psi. This is the first time its been spun since somewhere around 1955. Is that fairly good compression? Also, where can I find a Champion 6-M spark plug? Thanks,
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    Is this oil slick normal?

    Got my dad’s ‘67 Merc 9.8 hp working again, but when I run it in a garbage can I get an awful lot of ugly grey/tan oil floating on top, is that normal for these old engines?
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    1967 Merc 9.8 hp crappie engineering.

    My mistake, the stud is not 2 & 1/4 inches long as I stated, it's 2 & 5/16 so I was off by 1/16th of an inch. So yes this is the original stud and your just lucky you never stripped one out.
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    1967 Merc 9.8 hp crappie engineering.

    Here's a picture of the stud. You can see it was only in about 3 threads. I should have taken a picture of mating hole before I tapped it. As I said it was an inch deep but only tapped 3 threads.
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    1967 Merc 9.8 hp crappie engineering.

    Got this thing running thanks to the help here, but ran into a snag when I replaced the water pump impeller.. The rear stud that holds the lower unit together is by design only threaded in 2 and 1/2 threads!!! That's because the hole that it threads into, although being 1 inch deep, is only...
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    1967 merchandise 110, 9.8 hp timing marks

    I'm ordering parts today, thank you very much! The other thing I wondered is what does this flush plug actually flush?
  15. L

    1967 merchandise 110, 9.8 hp timing marks

    1) What does this plug flush? 2) Does the plastic tube on the left of my hand get pressed into the top of the water pump housing? Does the small rubber seal on the right of it get pressed down into the housing first? The rubber seal was on the end of the water supply tube that runs up to the...
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    1967 merchandise 110, 9.8 hp timing marks

    Anyone know where the timing mark's are on a 67 110, 9.8 hp motor? It's the older style with points condenser and coils. Thanks.
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