Cool Fuel plumbing question

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02-25-2022 | 11:37 AM

#11

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From: On A Dirt Floor

Just posting pic snd link: #16 is screen filtrr under reg /top of cooler i was referring to.
https://www.mercruiserparts.com/bam/...31904/2690/100

02-25-2022 | 11:44 AM

#12

DrFeelgood

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From: Orlando, FL

Quote:

Originally Posted by SB

Just posting pic snd link: #16 is screen filtrr under reg /top of cooler i was referring to.
https://www.mercruiserparts.com/bam/...31904/2690/100

Yup thanks. Gonna disassemble that after work and check it out.

02-25-2022 | 01:07 PM

#13

Griff

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From: Omaha/LOTO

Quote:

Originally Posted by DrFeelgood

In addition, these 502s have MEFI 1 PCMs and the early MPI Keihin style injectors, but have the later cool fuel system instead of a VST. So it's possible someone bastardized the whole thing at some point over the years.

I believe you are correct. Pretty sure the MEFI 1's were only on VST engines

02-25-2022 | 01:37 PM

#14

AllDodge

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From: KY

MEFI 1 with VST and mechanical pump mounted on raw water pump. MEFI 3 no mechanical fuel pump, and both used the standard fuel filter head

02-25-2022 | 01:38 PM

#15

DrFeelgood

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From: Orlando, FL

Quote:

Originally Posted by AllDodge

MEFI 1 with VST and mechanical pump mounted on raw water pump. MEFI 3 no mechanical fuel pump, and both used the standard fuel filter head

No mechanical pump. Filter heads on the forward bulkhead, plumbed directly (albeit backwards) to Cool Fuel under port side of motor. PCM has connectors on the ends not on the top/side

02-25-2022 | 01:46 PM

#16

AllDodge

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From: KY

Quote:

Originally Posted by DrFeelgood

No mechanical pump. Filter heads on the forward bulkhead, plumbed directly (albeit backwards) to Cool Fuel under port side of motor. PCM has connectors on the ends not on the top/side

Sounds like a 7.4 L29 MEFI-2 and put on a 502
https://www.mercruiserparts.com/7-4l...-454-v-8-199-1

Look on the back of the MEFI for the numbers