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  #26   IP: 24.152.131.220
Old 09-22-2010, 06:17 PM
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Please forgive the wise-a$$ answer but yeah, I've got a thought. Why not drop $40 on an electric pump and be done with it?
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Last edited by ndutton; 09-22-2010 at 08:40 PM.
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  #27   IP: 173.166.26.241
Old 09-22-2010, 10:40 PM
hanleyclifford hanleyclifford is offline
 
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In his own inimitable way Neil makes a very good point. Most of the active members on this forum it would seem have gone the electric route. Mechanical pumps are increasingly expensive to buy or rebuild. The sediment bowl arrangement no longer seems adequate in the age of ethanol. Most of us have resorted to some type of cartridge filter/separator which can be mounted at a place convenient for observation and service. Such units can handle a lot of crud and water. Electric pumps can also be mounted remotely and conveniently: this is a big consideration for those with difficult engine access. Finally, electric pumps eliminate the danger of the dreaded ruptured diaphragm. The Facet and Carter units are the ones we hear most about.
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  #28   IP: 24.152.131.220
Old 09-22-2010, 11:33 PM
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Apologize again for the crack, I was in a wisenheimer mood.

The reality is we will all eventually go electric if for no other reason than attrition and corresponding lack of parts availability. With regard to the mechanical fuel pumps, they're going the way of the double action 3 spring thermostats - those that prefer them are hoarding their own private stash of replacements.

For some it boils down to a financial choice. How much have you spent trying to breathe life into your mechanical pump? And maybe more importantly, how much sailing time has been lost in the process? For those in the northeast and similar climes, the season is limited and sailing days are precious. Depending on access, switching to an electric pump might take an hour's work, start to finish (5 trips to the parts store not included).
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  #29   IP: 24.93.230.16
Old 09-23-2010, 09:41 AM
jerrysingle jerrysingle is offline
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Fuel Pump Saga

Seems we are having overlapping conversations but this thread seems to bring to bear the point you make about going to electric fuel pump and dump the six month project/saga I have been engaged in.

Neil brings up the point of a $40 dollar fuel pump. I really have not seen that as a solution mostly out of my ignorance of the mechanics of changing from mechanical to electric.

Any thread or documentation that outlines the switch?
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  #30   IP: 206.125.176.3
Old 09-23-2010, 10:00 AM
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Quote:
Originally Posted by ndutton View Post
<snip>

With regard to the mechanical fuel pumps, they're going the way of the double action 3 spring thermostats - those that prefer them are hoarding their own private stash of replacements.

<snip>
I have no idea who you are talking about here Neil!

So, is the fact that I have (almost) 3 mech pumps and the original Holley double-action thermostat as a spare a bad thing?
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"Twice Around" - '77 Catalina 30, #511 with original A-4 & MMI manifold - for sale - PM me if interested
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  #31   IP: 64.20.183.220
Old 09-23-2010, 10:25 AM
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Quote:
Originally Posted by jerrysingle View Post
Any thread or documentation that outlines the switch?
IF you buy the pump that MMI sells on this site, it has very easy to follow instructions on the switchover.
If the rest of us Knuckleheads can do it, trust me, you can too...
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  #32   IP: 173.166.26.241
Old 09-23-2010, 12:59 PM
hanleyclifford hanleyclifford is offline
 
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Sooo...Shawn - What sort of negotiable goodies do you have? I have a milkcrate full of mechanical pump parts.
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  #33   IP: 24.152.131.220
Old 09-23-2010, 04:14 PM
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Quote:
Originally Posted by sastanley View Post
I have no idea who you are talking about here Neil!

So, is the fact that I have (almost) 3 mech pumps and the original Holley double-action thermostat as a spare a bad thing?
No, didn't mean to imply anything like that. I may have an electric fuel pump with side benefits discussed elsewhere on this forum but I confess to having a spare 3 spring thermostat, vinegar soaked and stove top tested. No spacer in my future.
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  #34   IP: 24.152.131.220
Old 09-23-2010, 04:42 PM
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Originally Posted by jerrysingle View Post
Neil brings up the point of a $40 dollar fuel pump. I really have not seen that as a solution mostly out of my ignorance of the mechanics of changing from mechanical to electric.

Any thread or documentation that outlines the switch?
When I threw out the $40 figure it was for the pump only bought through a discounted source. There are other parts necessary to complete a proper installation. If you prefer a complete package kit, as Roadnsky Jerry said there's one available on this site:

Here ya go

It will save you the forewarned multiple trips to the store. Maybe the parts department here could provide you with installation instructions so you can determine whether you want to take on the project. My opinion is it's easier than what you've already been through.
Quote:
and dump the six month project/saga I have been engaged in.
Six months, really? Your old fuel pump is sending you a message. I expect there are plenty of old skoolers around here who'll be happy to take it off your hands.
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  #35   IP: 71.252.15.151
Old 09-23-2010, 05:40 PM
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Quote:
Originally Posted by hanleyclifford View Post
Sooo...Shawn - What sort of negotiable goodies do you have? I have a milkcrate full of mechanical pump parts.
Hanley, i am an A-4 newbie. I have only managed to procure one extra carb and since I have converted to the plate and single action t-stat, my original 3-spring is my 'spare'.

However, I have a friend with a Pearson 28 that is trying to put together a mechanical pump. He was going to buy the Moyer improved top section, but it looks like I don't have any spare parts to help him with the rest. I must have put them in the wrong box and pitched them.

I have a bronze prop shaft and a 2 blade 12" prop~
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"Twice Around" - '77 Catalina 30, #511 with original A-4 & MMI manifold - for sale - PM me if interested
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  #36   IP: 173.166.26.241
Old 09-23-2010, 08:52 PM
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Shawn - Next trip thru Solomons I'll have her loaded with mechanicals. Will accept Confederate dollars or Heineken. Regards, Hanley
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Old 09-24-2010, 05:53 AM
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I think I have the old mechanical pump that I replaced with a Facet electrical, sitting on a shelf doing nothing important. I think the upper housing might possibly be warped (my excuse for getting the new Facet anyway), but apparently it was working OK for the PO when we bought the boat. PM me if interested.
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Last edited by rigspelt; 09-24-2010 at 06:00 AM.
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  #38   IP: 70.188.238.132
Old 04-04-2011, 09:50 PM
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4 extra fuel pumps

I was cleaning out my A4 carb&fuel pump drawer and found 4 mechanical fuel pumps. Anyone want them? You can have them for $5 packaging each and shipping from 32507.
I replace them with Facet electric pumps, so have no need for them. e mail me at oldflathead@bshmarine.com

Tom
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  #39   IP: 206.125.176.3
Old 04-06-2011, 12:01 PM
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Question

I just finished rebuilding another spare that is ready for service...if you guys can convince me to quit hoarding them and come further to the dark side at the next opportunity, I may be convinced. Maybe I just don't know any better.
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"Twice Around" - '77 Catalina 30, #511 with original A-4 & MMI manifold - for sale - PM me if interested
"Holiday" - '89 Alura 35 #109 (uh oh, two boat owner!!)
http://www.moyermarine.com/forums/signaturepics/sigpic3231_6.gif
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  #40   IP: 50.92.210.172
Old 01-14-2013, 01:06 AM
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Fuel pump rebuild

I had similar explosion of springs. Just to be clear:

I have installed both springs vertical, parallel to each other in the little seats in the bottom half of the housing. I have put two little caps on top of the springs. One of the caps then naturally lies under the rod connected to the diaphragm. The other lies under a bit of the mechanism that is activated by the push rod.

Is this correct?

Second question: The instructions emphasise not tightening the various
screws too much. I'm worried about obtain a good seal. Should
I apply Permatec to the following locations:
1) The diaphragm and the two halves of the pump body?
2) The cork gasket between rocker arm cover and the lower half of the pump body
3) The pump and the engine?

How tight should the pipe fitting connect the copper tube to the carb be?

Thanks,

SG


Quote:
Originally Posted by shemandr View Post
one question on the rebuild of the fuel pump: since the lower housing cover came off with an explosion of springs and associated parts i did not get to examine the placement of same. i surmized from the picture that the two springs are placed, one on the rocker arm and one on the end of the rocker arm over the end of the plunger/diaphram. they then fit the hubs on the cover on the other end. is that correct? assembled this way i get a healthy squirt of gas using the priming lever, and similar noise if i engage the end of the rocker arm and push it with a screwdriver.
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  #41   IP: 99.124.190.130
Old 01-14-2013, 11:17 AM
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Stephan,
The only one of those locations where you 'might' need some Permatex is between the diaphragm and the upper body, and this is only if the mating surface in the upper body is in poor shape. The other joints are normally dry. The only time they would do any sealing is if the diaphragm fails. In that case, I'd want to know there was a leak - ie: before the crankcase filled up with gas.
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