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Old 18-03-2021, 18:56   #1
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Booster fuel pump for Perkins Prima 50??

My Perkins prima 50 1990 vintage needs 10 -15 seconds starter grinding to start from cold. But when warmed up only couple seconds. i suspects the fuel is leaking down. On previous boats I have had 2-4 psi automatic fuel booster pumps. Maybe I need one here? One of these prior pumps was automatic and was handy to fill fuel filter bowls too. Cant remember the name /model. Advice please. Thanks.
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Old 18-03-2021, 20:35   #2
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Re: Booster fuel pump for Perkins Prima 50??

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Originally Posted by georgetheleo View Post
My Perkins prima 50 1990 vintage needs 10 -15 seconds starter grinding to start from cold. But when warmed up only couple seconds. i suspects the fuel is leaking down. On previous boats I have had 2-4 psi automatic fuel booster pumps. Maybe I need one here? One of these prior pumps was automatic and was handy to fill fuel filter bowls too. Cant remember the name /model. Advice please. Thanks.

most likely you have a small leak somewhere in the return lines from your injectors. i had the same issue after reusing crush washers, got a kit on amazon for $7 and fixed the issue.



Also, does your engine smoke on startup? That's one problem i haven't solved on 2 different primas
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Old 18-03-2021, 20:41   #3
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Re: Booster fuel pump for Perkins Prima 50??

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Originally Posted by georgetheleo View Post
On previous boats I have had 2-4 psi automatic fuel booster pumps. Maybe I need one here? One of these prior pumps was automatic and was handy to fill fuel filter bowls too. Cant remember the name /model. Advice please. Thanks.
You might be thinking of a Facet pump. See https://www.facet-purolator.com/
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Old 19-03-2021, 09:54   #4
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Re: Booster fuel pump for Perkins Prima 50??

Almost any electric fuel pump, rated for diesel, will work.



If fuel is leaking back it could be a combination of air leaks and worn valves in the lift pump. Fuel pump valves are one way valves like a check valve and should stop fuel from moving away from the engine.
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Old 20-03-2021, 09:03   #5
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Re: Booster fuel pump for Perkins Prima 50??

Another option is a Keenan filter, which provides an electric pump as supplement to the lift pump, and it allows you to polish fuel en route, and allow easy filter changes, and with a two filter system you can switch from filter 1 to filter 2 by moving a lever. I got one of these after a clogged filter caused by very rough seas stirred up gunk in the tank and stopped fuel to the engine just as I was entering an inlet (of course). Luckily, I had sail up and could sail in, but it might have been some place less forgiving.

Btw, I have no connection to the company. Just a satisfied customer.

https://www.keenanfilters.com/
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Old 20-03-2021, 22:29   #6
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Re: Booster fuel pump for Perkins Prima 50??

As stated above first check for leaks. I prefer my Waldrup backup fuel pump for a variety of reasons.
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Old 20-03-2021, 22:37   #7
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Re: Booster fuel pump for Perkins Prima 50??

Quote:
Originally Posted by georgetheleo View Post
My Perkins prima 50 1990 vintage needs 10 -15 seconds starter grinding to start from cold. But when warmed up only couple seconds. i suspects the fuel is leaking down. On previous boats I have had 2-4 psi automatic fuel booster pumps. Maybe I need one here? One of these prior pumps was automatic and was handy to fill fuel filter bowls too. Cant remember the name /model. Advice please. Thanks.
It could also be low compression but it may simply be low battery volts at the starter motor either due to a poor battery or poor cabling.

I would check the easiest first. Measure the voltage at the starter solenoid while cranking. If below 10V, find out why.

Does the engine have pre heat or glow plugs; if so, they could be faulty.
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Old 21-03-2021, 02:39   #8
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Re: Booster fuel pump for Perkins Prima 50??

First check your pre heat is connected and working ,if no pre heat you will need to wind her over for two or three short bursts to get some heat into the pre combustion chambers,the 4 108 4 107 and a lot of diesels have pre combustion chambers and need glo plugs for a quick cold start ,with out glow plugs she will be Smokey on cold starts .,hope this helps ��⚓️
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