If you have been keeping up with your filter changes (primary, secondary,
Racor, etc.) and the boat is used regularly, my bet is on an air leak somewhere
in the fuel system, perhaps generated by changing your filters.
An overtightened Racor can deform the lid and allow air in and any change in
the mechanical fuel pump may reduce what fuel it can deliver especially at high
rpm.
As others have suggested, it could be fuel crud as well.
Either way I would follow the KISS principle and check the simplest possible
solution first before proceeding to more complicated solutions—something I have
a tendency to do! (e.g. if you hear the sounds of a stampede, assume they are
horses and not hippos).
It took my mechanic and myself several years to determine that my similar fuel
delivery problem was likely caused by a mechanical lift pump barely able to
deliver enough fuel at high rpm ( Beta engine replaced original Yanmar and the
Beta pump was barely able to left the fuel to the engine compounded by air
leaks, etc.)
Ultimately after a few years of erratic operation he bypassed the mechanical
pump and added a simple electric fuel pumps (x2) for redundancy and they were
cheap!) and problem was solved—although we never confirmed with confidence what
the original problem(s) were.
Charlie Nelson1995 C&C 36XL/kcbWater Phantom
Sent from the all new AOL app for iOS
On Friday, June 9, 2023, 1:36 PM, CHARLES SCHEAFFER via CnC-List
<cnc-list@cnc-list.com> wrote:
Loose wire or bad terminal? My Universal M4-30 has an electric fuel
booster pump. A dirty ground connection caused a problem called; speed up and
die, or lack of fuel. Ours always restarted however and then cut out above
half throttle. The wire terminal was green. Cleaned it with emery cloth and
she ran fine for the next 12 hours. Once home, I changed the pump and hoses
and remounted the water separater to it was easier to work on. Chuck
S
On 06/09/2023 12:43 PM EDT Neil Andersen via CnC-List <cnc-list@cnc-list.com>
wrote: My similar issue was due to a fuel pump issue.
Neil Andersen, W3NEA Formerly 1982 C&C 32, FoxFire Rock Hall, MD 21661
484-354-8800 From: Dreuge via CnC-List <cnc-list@cnc-list.com>
Sent: Friday, June 9, 2023 11:40:17 AM
To: cnc-list@cnc-list.com <cnc-list@cnc-list.com>
Cc: Dreuge <dre...@gmail.com>
Subject: Stus-List Re: Engine strangeness I once had a similar engine
issue. It would run fine one day (or half) and constant stall upon or shortly
after restarts. It turned out that my Racor was not full tightened. Easy fix
once found.
-
Paul E. 1981 C&C Landfall 38
S/V Johanna Rose
Fort Walton Beach, FL http://svjohannarose.blogspot.com/
On Jun 9, 2023, at 11:27 AM, ALAN BERGEN via CnC-List <cnc-list@cnc-list.com>
wrote:
On Fri, Jun 9, 2023 at 7:22 AM David Knecht via CnC-List
<cnc-list@cnc-list.com> wrote:
I am out for the first time this season. Engine started right up. Motored out
of harbor for two hours. Turned engine off for a while waiting for wind.
Started back up. Ran for 15-30 sec and died. Started up and ran for a bit
longer then died. Pulled bed to get access and fuel pressure and level in racor
look fine. Started up and ran fine for 40 min. WTF? Dave
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Please show your appreciation for this list and the Photo Album site and help
me pay the associated bills. Make a contribution at:
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Thanks for your help.
Stu
Please show your appreciation for this list and the Photo Album site and help
me pay the associated bills. Make a contribution at:
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Thanks for your help.
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