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Old 21-06-2016, 21:30   #31
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Re: A gift from the bilge monster

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Originally Posted by marathon lady View Post
Like most boats I have a monster living in the bilge that consumes anything that happens to be dropped, to day my monster gave something back can anyone help in identifying where this may have come from. I have a beneteau 430 with a perkins prima 50 motor, recently had work done on the heat-exchanger, high pressure fuel pump and water pump.






Attachment 126657
It appears to me that it could be the pin out of the water pump impeller. Probably fell out of a previously replaced impeller.
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Old 21-06-2016, 21:35   #32
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Re: A gift from the bilge monster

I still say it's a dowel pin...
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Old 21-06-2016, 21:58   #33
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Re: A gift from the bilge monster

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The pin is round no flat surfaces, it appears to have some green paint (same color as the motor) on one end.
High probability that it is a dowel from the engine then. Volvo?
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Old 21-06-2016, 22:47   #34
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Re: A gift from the bilge monster

it's a Perkins
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Old 21-06-2016, 23:00   #35
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Re: A gift from the bilge monster

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High probability that it is a dowel from the engine then. Volvo?
Engine dowels are a lot smaller than that pin. And an engine dowel is never made from stainless steel.

And the next round key I see will be the very first one. Where would anybody use a round key? Keys are always square. And even if it were a key, it would have been used in something waaaaay bigger than a water pump impeller or a shaft coupling. Most water pumps on sailboats have shafts smaller than that

The post referring to a mast step retainer had me going . . . . Not anymore
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Old 21-06-2016, 23:31   #36
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Re: A gift from the bilge monster

that pin is not stainless steel, my perkins head has two .25 dia. locator pins I know them well.
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Old 22-06-2016, 00:57   #37
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Re: A gift from the bilge monster

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that pin is not stainless steel, my perkins head has two .25 dia. locator pins I know them well.
.25 dia sounds reasonable - do you know them well enough to know that they're not an inch long? Because the pin in the OP is. And on rudimentary comparison I reckon the pin shown by the OP is 5/16" dia. not 1/4"

It looks like SS to me, you obviously have an inside track on what the material is that I've missed.

But I'm sure you're right and I'm done competing.
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Old 22-06-2016, 01:13   #38
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Re: A gift from the bilge monster

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It looks like SS to me, you obviously have an inside track on what the material is that I've missed.
Why don't you ask the OP to try the old magnet test? Should end that particular debate.

Jim
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Old 22-06-2016, 09:04   #39
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Re: A gift from the bilge monster

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Why don't you ask the OP to try the old magnet test? Should end that particular debate.

Jim
Not quite, 400 series SS is magnetic. Or is it 300, I forget.

Had anyone else noticed it appears to have a slight radius on at least to the right of the pic.. Dowel pins often have that I'm not sure if it intentional or a result of cutting it off from longer stock. Probably on a lathe?
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Old 22-06-2016, 15:25   #40
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Re: A gift from the bilge monster

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Not quite, 400 series SS is magnetic. Or is it 300, I forget.

Had anyone else noticed it appears to have a slight radius on at least to the right of the pic.. Dowel pins often have that I'm not sure if it intentional or a result of cutting it off from longer stock. Probably on a lathe?
Well, yes, the 400 series of s/s (and duplex as well) are indeed magnetic. However, the 400s are not typically used for hardware like dowel pins, but usually for cutlery and other applications where the greater hardness is a virtue.

And you are right... it does look like a dowel pin to me, as several others have said. The presence of paint on one end is consistent with this idea: there are often dowels used as locators in the bell housing to engine flange, and the outer end of those might well get painted with the rest of the engine.

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Old 22-06-2016, 15:50   #41
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Re: A gift from the bilge monster

Stick it on the for sale forum and see what happens
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Old 22-06-2016, 15:51   #42
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Re: A gift from the bilge monster

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Originally Posted by Jim Cate View Post
Well, yes, the 400 series of s/s (and duplex as well) are indeed magnetic. However, the 400s are not typically used for hardware like dowel pins, but usually for cutlery and other applications where the greater hardness is a virtue.

And you are right... it does look like a dowel pin to me, as several others have said. The presence of paint on one end is consistent with this idea: there are often dowels used as locators in the bell housing to engine flange, and the outer end of those might well get painted with the rest of the engine.

Jim
Back to the bilge. God only knows what might be found? The only other place is a slip and the no. of screw drivers that can be found.
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Old 23-06-2016, 19:49   #43
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Re: A gift from the bilge monster

it appears to be round, which would make it a dowel pin. one of that size wouldn't go in to any of the components you stated as being repaired recently. one that size would be for aligning the flywheel and/or housing, reverse gear to said housing or...hhmmm...nothing else on that size engine. the ones for aligning the head or exhaust manifold and other various things are smaller diameter. Has your reverse gear been R&R'd? the pins in a "V" drive are much smaller. Are you the first owner of this boat? no telling how long it's been down there.
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Old 24-06-2016, 10:24   #44
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Re: A gift from the bilge monster

Working on the fresh water pump or fuel injection pump on the M50 requires the removal of the timing belt. There are 2 "locating" pins for the fuel pump pulley and 2 "timing" pins for the camshaft & flywheel called for in the M50 manual to help with maintaining timing. The pin in the picture is shorter than those sold by Perkins but that pin may have been one of the pins used by the mechanic to take the place of the pins called for by Perkins. The diameter is close but I'm not sure if the length would suffice.
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Old 24-06-2016, 10:46   #45
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Re: A gift from the bilge monster

It is from nothing. The bilge monster left it just to play with your head.
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