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Old 10-30-2016, 10:50 AM   #1
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Racor 400 Series

I have bought an Allweather in need of serious rehabilitation. Other than the engine (Yanmar 3HM) which I think is good, I plan on replacing wiring from the batteries up and the fuel system. I have looked at the 400 series Racor filters with built in priming pump. The manual for this filter describes using the built in pump for filling the filter. Can the pump also be used for bleeding the engine after filling the filter? I would be installing the filter just below the top of the tank and a foot or so below the mechanical fuel pump.
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Old 10-30-2016, 11:02 AM   #2
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I would read the Yanmar manual to understand the bleeding process before trying to do it differently.

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Old 10-30-2016, 11:08 AM   #3
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Did you find an ALLWEATHERBOATS.COM

If so, my hat's off to you for nabbing such a rare, capable, awesome boat!
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Old 10-30-2016, 11:21 AM   #4
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Ted, I have read the manual and it describes the standard practice of using the lever on the mechanical fuel pump to bleed the system. I understand this but that little lever is somewhat difficult to access. The new filter would be mounted right next to the engine.

Murry, Yes it is an Allweather ALLWEATHERBOATS.COM
I have admired these boats since I first saw one 30 years ago.
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Old 10-30-2016, 11:30 AM   #5
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I have inline electric fuel pumps that I activate to bleed my fuel system on my Perkins 4.236's. They are positioned downstream from the Racors and before the lift pumps. They work great for priming the Racors, too.
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Old 10-30-2016, 11:41 AM   #6
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FlyWright,
Are your inline electric pumps in a bypass or just inline? I am wondering about the type of pump that allows fuel flow through it when not operating.
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Old 10-30-2016, 12:37 PM   #7
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They are inline, flow through. They were there for years installed by the PO but not wired in and I didn't know what they were.

Here's a pic from another thread about my fuel system. The fuel pump is below the Racor selector valve.

Fuel Contamination (and Racor Filter Help)

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Old 10-30-2016, 02:55 PM   #8
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Hello AK guy,

Yes - nice choice of boat you made.
The Allweather hull design originated in Norway. (Mine did as well; very similar design). Very seaworthy and efficient in most conditions.

I have an inline electric fuel pump on my Vetus engine (no mechanical pump). I love it; it is self bleeding even after changing fuel filters.
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Old 10-31-2016, 07:33 AM   #9
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Quote:
Originally Posted by ak-guy View Post
I have bought an Allweather in need of serious rehabilitation. Other than the engine (Yanmar 3HM) which I think is good, I plan on replacing wiring from the batteries up and the fuel system. I have looked at the 400 series Racor filters with built in priming pump. The manual for this filter describes using the built in pump for filling the filter. Can the pump also be used for bleeding the engine after filling the filter? I would be installing the filter just below the top of the tank and a foot or so below the mechanical fuel pump.
No.
It will allow you to bleed the air from the racor and to bleed the line up to the lift pump on the engine. It wont push fuel through the lift pump
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Old 10-31-2016, 08:45 AM   #10
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Very nice boat u have there AK, so many similar features ..........gotta love those double enders from Scandanavia
My mechanical fuel pump on the Yanmar 3gmd packed up and I was advised to simply insert a Goss solid state electronic fuel pump between the tank and filter, completey bypassing the mechanical. It bleeds the line all the way through to the injectors, all so easy.
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Old 10-31-2016, 11:57 AM   #11
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Quote:
Originally Posted by stone beach View Post
It wont push fuel through the lift pump
Not true on my Perkins 4.236. It pumps through the lift pump without an issue. If the mechanical lift pump fails, I can turn on the electric pump and continue operation without removing or modifying the lift pump.

I suppose this might not be true with all lift pumps. YMMV.
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Old 10-31-2016, 02:48 PM   #12
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Quote:
Originally Posted by ak-guy View Post
FlyWright,
Are your inline electric pumps in a bypass or just inline? I am wondering about the type of pump that allows fuel flow through it when not operating.
Quote:
Originally Posted by FlyWright View Post
Not true on my Perkins 4.236. It pumps through the lift pump without an issue. If the mechanical lift pump fails, I can turn on the electric pump and continue operation without removing or modifying the lift pump.
.
This is how I run mine. Most Walbro's are pass through pumps.

Walbro FR-Series Industrial and Marine Fuel Pumps from Fuel-Pumps.net
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Old 11-01-2016, 02:43 AM   #13
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Originally Posted by FlyWright View Post

Not true on my Perkins 4.236. It pumps through the lift pump without an issue. If the mechanical lift pump fails, I can turn on the electric pump and continue operation without removing or modifying the lift pump.

I suppose this might not be true with all lift pumps. YMMV.
Flywright.
What are you saying will pump (fuel) through the lift pump? The Racor pump (as the op asked) or your electric pump??
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Old 11-01-2016, 08:47 AM   #14
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Check out seaboard marines filters and bulb priming set up.
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Old 11-01-2016, 01:45 PM   #15
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Quote:
Originally Posted by stone beach View Post
Flywright.
What are you saying will pump (fuel) through the lift pump? The Racor pump (as the op asked) or your electric pump??
Both. The lift pump will suck fuel through the inactive electric fuel pump and the electric fuel pump, when energized, will pump through the inactive mechanical lift pump. At least, that's how mine works.
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