Hi Danny,
You don't need to use premium gas in a relatively low compression
engine unless your fuel hose is not gas meth compatible (and maybe
some ancient injection equipment as found on old VWs, not the case
here!). The higher octane rating does not make it "better" gas but it
does slow the burn rate.
So, sooty plugs eh. To state the obvious: fuel too rich or more
precisely fuel/air ratio too high since we've ruled out plug heat
range, low compression and sticky oil wiper rings by virtue of Moyer rebuild.
Air side:
Is you air filter clean? engine space too tight? vent blower run continuous?
Fuel side:
main jet too big is already covered off by Moyer, float set too high?
or what I believe is the culprit... float needle valve not seating
correctly or a bad needle & seat (all it takes is a speck o' dirt there).
What is your fuel pump pressure set at? It could be too high.
Cheers, Russ
Sweet 35-1
east side o' Vancounver Island
clouds and showers on first of two weeks off :(
At 08:43 AM 13/08/2014, you wrote:
I am using champion RC12YC and using regular unleaded gas.
I guess if I'm to use premium, I'm going to need to lug it to the
boat in 5 gallon jugs...
---------- Original Message ----------
From: JOHN D IRVIN <john.ir...@rogers.com>
To: Danny Haughey <djhaug...@juno.com>, "cnc-list@cnc-list.com"
<cnc-list@cnc-list.com>
Subject: Re: Stus-List Ok more atomic 4 issues...dammit!
Date: Wed, 13 Aug 2014 08:38:52 -0700
Are you using a hot enough plug and premium fuel?
On Wednesday, August 13, 2014 11:33:11 AM, Danny Haughey via
CnC-List <cnc-list@cnc-list.com> wrote:
----- Forwarded Message -----
Alright, the saga continues.
We went for a sea trial Sunday after the changes, i.e. Vent line
cleared, filters changed, clamps tightened. The engine ran great
all the way to Cuttyhunk. I probably ran it about 3 hours. Two of
those hours I ran it a little harder than I normally do after having
read Don M's reasons for having black sooty spark plugs. I thought
my problems were solved.
On our way home from cuttyhunk, We motored out the harbor and
decided that, because the wind was a little light, we would motor
home to run the engine some more. 50 minutes into our ride home, the
same thing, only a bit slower. the whole, slow, stall happened over
maybe a minute or two. Some sputter, then run normal, a little more
sputter, then normal and then a slow stall.
We then sailed home and into the mooring field. This is actually a
benefit of the engine troubles, I've been a bit intimidated about
sailing onto the mouth of the river due to the current and very
tight channel flanked by shoals and some pretty ominous looking
rocks. I've now had to sail into the harbor twice over this last
weekend. At one point we were probably doing 4 or 4.5knts through
the water but only 1 to 1.5knts over the ground fighting that
current. On one side of the boat it a big, rocky cliff and the other
shoal. it was a little adrenalin pumping! Anyway, the approach to
our mooring was dead, head to wind, along with the current in the
same direction, I lost forward motion under sail and started the
engine. She started right up and we motored onto the mooring without incident.
So, safely moored, I pulled the vent tube, it was clear. I then went
below and pulled a spark plug and it was all black and sooty again
after maybe 4 hours running time.
I used the Moyer rebuild kit on the carb that is on there now. I'm
not sure but, I think I changed the main jet to the moyer recomended
one at that time. I think it came with the rebuild kit.
My earlier idling issues seemed to have been solved by swapping out
the carb that came with the exchange engine for the one I rebuilt
off the original engine and had just sitting around as a spare. I
think what I would like to do now is, clean up the carb that came
with the exchange engine. and swap them back out. I'll then replace
the plugs and run it some more. Unless you guys think I should maybe
try another path forward.
Danny
P.S. Cuttyhunk was Amazing!
Could be the carburetor. I've had this issue too many times. I chose
to take off the carb, break it down completely and clean it out.
Moyer Marine's A4 guide is very useful.
Brian
s/v Rekofa The Blue Whale
1979 C&C 34
Baltimore, MD
Dr. Brian C. Morrison
On Aug 10, 2014, at 9:48 AM, "Burt Stratton via CnC-List"
<<mailto:cnc-list@cnc-list.com>cnc-list@cnc-list.com> wrote:
Good question. I suppose it is possible but seems unlikely. The fuel
pump ought to be able to overcome that. Can you drain the trap? I
would drain or remove the trap and try it. Try a new P-trap
designed for the purpose. Might want to check the operation of your fuel pump.
I just put my boat in the water for the first time and had a similar
issue. 5 minutes and then stall. Starts back up after a short wait
but won't run for longer than about five minutes. Sort of ran if
fully choked. Turned out to be a broken electrical feed to my
electric fuel pump. Hard to believe how long it ran without a fuel
pump! I guess gravity and vacuum will do part of the job, even
through two filters.
Skip
From: CnC-List
[<mailto:cnc-list-boun...@cnc-list.com>mailto:cnc-list-boun...@cnc-list.com]
On Behalf Of Danny Haughey via CnC-List
Sent: Saturday, August 09, 2014 5:38 PM
To: <mailto:cnc-list@cnc-list.com>cnc-list@cnc-list.com
Subject: Stus-List Ok more atomic 4 issues...dammit!
-------- Original message --------
From: Danny Haughey <<mailto:djhaug...@juno.com>djhaug...@juno.com>
Date: 08/09/2014 5:32 PM (GMT-05:00)
To:
<mailto:derlic...@gmail.com,mda...@darkstar.ca>derlic...@gmail.com,mda...@darkstar.ca
Subject: Ok more atomic 4 issues...dammit!
Okay so no wind today...
I pulled up to the gas dock, topped off water and fuel, loaded up
and away we went. Motor was running great! Fired up left dock,
motored away. After about an hour she seemed to be running out of
gas. Stutter ed and stalled. Five minutes later, after seeing
sail, she started right back up. We sail back to our home
mooring. I pull the filter on the sepertator, looked clean as the
day I put it in. Then I thought, maybe the vent is
plugged... well, it wasn't plugged but it is routed with a trap and
that trap was filled with fuel. Would this have been enough to
starve the engine?
Danny
From my Android phone
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