Re: [OMC-Boats] engine wierdness from Scott Veazie on 2009-10-29 (OMC-Boats Mailing List Archive)

From: Scott Veazie <scottveazie@...>
Date: Thu, 29 Oct 2009 13:05:40 -0700

Yup...no spark for the plugs. Also don't discount a bad condenser, I had one leave me stranded.

> From: jdood@...
> To: omc-boats@...
> Date: Thu, 29 Oct 2009 12:45:06 -0700
> Subject: Re: [OMC-Boats] engine wierdness
>
> yeah, maybe the coil - hope its something that easy. i guess that
> would do it wouldn't it? if i understand it all correctly, if the
> coil shuts down then no spark is being send to ANY of the plugs,
> right? which would make the engine completely die instantly.
>
>
> On Oct 29, 2009, at 10:41 AM, Scott Veazie wrote:
>
> > JD-
> >
> > >From my past experience, I would start with a new coil, then get
> > new points, condenser, cap, rotor, check all spark plugs and wires.
> > Get all that ignition nonsense eliminated as a potential problem,
> > and then go from there. You probably won't have to replace your
> > dist. cap though.
> >
> > ~Scott
> >
> > > From: jdood@...
> > > To: omc-boats@...
> > > Date: Thu, 29 Oct 2009 10:00:31 -0700
> > > Subject: Re: [OMC-Boats] engine wierdness
> > >
> > >
> > > i just don't see how it can be any kind of electrical system thing,
> > > esp since i re-did most of the wiring this summer and it's now very
> > > solid. but who knows. and what "electrical" stuff is happening
> > > with the engine while its running anyway?
> > >
> > > - one wire sends power to the starter when the key is turned -
> > that is
> > > working fine
> > >
> > > - there's a purple wire that runs to the electric choke (i guess) on
> > > the carb - perhaps that?
> > >
> > > - there's theres a wire going to the coil and stuff - perhaps that?
> > >
> > > - then there's the alternator - perhaps that?
> > >
> > >
> > > The last 3 on this list i don't really understand at all, esp what
> > > their function is AFTER the engine is up and running. If
> > > electrical, it has to be something that functions not just to start
> > > the engine, but to keep the engine running. Doesn't that just
> > > narrow it down to the alternator? Or is there other electrical stuff
> > > that has to do with the engine staying running?
> > >
> > >
> > >
> > >
> > >
> > > On Oct 29, 2009, at 9:02 AM, ANDY PERAKES wrote:
> > >
> > > > I tend to agree with the electrical suspect. Fuel/air problems
> > > > generally linger a bit and don't result in an immediate drop-out
> > > > like you describe. Anything is possible though. I like the
> > > > guidance Lee sent out awhile back where he said to eleiminate the
> > > > possibility of electrical problems first since that's usually
> > > > quicker and easier to do. Trouble is, intermittent electrical
> > > > problems can be a nightmare to trace. Is there any possibility of
> > > > hooking up some basic instrumentation to see if there is any
> > > > electrical effect when it happens? If you see a sudden voltage
> > > > change or current drop out, that would be a clear indicator. Good
> > > > luck!
> > > >
> > > > Andy
> > > > '67 Reveler
> > > >
> > > >
> > > > ----- Original Message -----
> > > > From: "jd" <jdood@...>
> > > > To: "Evinrude & Johnson Boats of the 1960's and 70's" <omc-boats@...sts.ultimate.com
> > > > >
> > > > Sent: Thursday, October 29, 2009 11:44:16 AM GMT -05:00 US/Canada
> > > > Eastern
> > > > Subject: [OMC-Boats] engine wierdness
> > > >
> > > > took my boat out for the last of possible testing this season
> > before
> > > > things get too cold and rainy. didn't go as i hoped. i'll
> > > > try and condense this down to it's simplest form:
> > > >
> > > > BEFORE (about a month ago):
> > > >
> > > > except for some slightly fast idling, engine ran well. Then I
> > > > noticed it starting to do this weird intermittent thing where
> > all the
> > > > power (throttle) would just drop down to zero. It seemed to happen
> > > > mainly during acceleration up to plane. This all was happening at
> > > > the end of the season, so I have pretty much had the boat
> > sitting for
> > > > the past month waiting for parts and time. But I was thinking it
> > was
> > > > related to my falling apart carb and / or and electrical thing
> > > > related to my rebuilt shifter switch. so......
> > > >
> > > > AFTER (yesterday):
> > > >
> > > > - I installed my nice practically new carb (rebuilt by flying
> > fish).
> > > > keep in mind, it was the exact same carb i have always had on the
> > > > boat, just completely rebuilt. I also changed my air water
> > separator
> > > > cartridge beforehand to avoid any chance of issues from fuel
> > that had
> > > > sat for a month.
> > > >
> > > > - I installed a NOS shifter switch that I recently acquired.
> > Tested
> > > > with light after install, everything checked out. And as I said,
> > > > it's basically new.
> > > >
> > > >
> > > > So after those two major upgrades, the engine is doing the same
> > dang
> > > > thing. Started up, let it warm up a bit, took it for a spin.
> > > > About 5-10 seconds after getting up on that first plane everything
> > > > just dropped down to zero and unlike the past times, this time the
> > > > engine died at the same time. Had to crank it over several times
> > > > for it to start back up, and when it did, with the red lever set
> > at
> > > > full throttle it took several seconds for the RPMS to climb up to
> > > > where they should be. I limped back to the dock.
> > > >
> > > > Then while at the dock idling for a few minutes, all of the sudden
> > > > it just died again. At idle this time, not while accelerating.
> > > > And every time it dies it is quick. It's not like it sits there
> > and
> > > > slowly dies. It just cuts out suddenly. So I of course tried to
> > > > restart it. Nothing for several tries, then it acted like it was
> > > > going to start, then it finally starts, coughing and sputtering a
> > > > bit, then very slowly climbs up to full throttle (in neutral).
> > > > I started thinking maybe a fuel pump issue. Disconnected fuel
> > > > line, cranked engine, plenty of pumping of fuel happening.
> > > >
> > > > It seems sort of electrical in the way it just all of the sudden
> > dies
> > > > either at idle or accelerating. Yet when it finally starts back
> > up it
> > > > coughs and sputters and smokes a bit. Which sounds like bad fuel,
> > > > yet I have a new water/fuel separator cartridge, the carb is new,
> > > > and nothing looks dirty with the inline regular fuel filter.
> > > >
> > > >
> > > > Any ideas?
> > > >
> > > >
> > > >
> > > >
> > > > _______________________________________________
> > > > OMC-Boats mailing list
> > > > OMC-Boats@...
> > > > http://lists.ultimate.com/mailman/listinfo/omc-boats
> > > > _______________________________________________
> > > > OMC-Boats mailing list
> > > > OMC-Boats@...
> > > > http://lists.ultimate.com/mailman/listinfo/omc-boats
> > >
> > > _______________________________________________
> > > OMC-Boats mailing list
> > > OMC-Boats@...
> > > http://lists.ultimate.com/mailman/listinfo/omc-boats
> >
> > Windows 7: It helps you do more. Explore Windows 7.
> > _______________________________________________
> > OMC-Boats mailing list
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>
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Yup...no spark for the plugs.  Also don't discount a bad condenser, I had one leave me stranded.   > From: jdood@... > To: omc-boats@... > Date: Thu, 29 Oct 2009 12:45:06 -0700 > Subject: Re: [OMC-Boats] engine wierdness > > yeah, maybe the coil - hope its something that easy. i guess that > would do it wouldn't it? if i understand it all correctly, if the > coil shuts down then no spark is being send to ANY of the plugs, > right? which would make the engine completely die instantly. > > > On Oct 29, 2009, at 10:41 AM, Scott Veazie wrote: > > > JD- > > > > >From my past experience, I would start with a new coil, then get > > new points, condenser, cap, rotor, check all spark plugs and wires. > > Get all that ignition nonsense eliminated as a potential problem, > > and then go from there. You probably won't have to replace your > > dist. cap though. > > > > ~Scott > > > > > From: jdood@... > > > To: omc-boats@... > > > Date: Thu, 29 Oct 2009 10:00:31 -0700 > > > Subject: Re: [OMC-Boats] engine wierdness > > > > > > > > > i just don't see how it can be any kind of electrical system thing, > > > esp since i re-did most of the wiring this summer and it's now very > > > solid. but who knows. and what "electrical" stuff is happening > > > with the engine while its running anyway? > > > > > > - one wire sends power to the starter when the key is turned - > > that is > > > working fine > > > > > > - there's a purple wire that runs to the electric choke (i guess) on > > > the carb - perhaps that? > > > > > > - there's theres a wire going to the coil and stuff - perhaps that? > > > > > > - then there's the alternator - perhaps that? > > > > > > > > > The last 3 on this list i don't really understand at all, esp what > > > their function is AFTER the engine is up and running. If > > > electrical, it has to be something that functions not just to start > > > the engine, but to keep the engine running. Doesn't that just > > > narrow it down to the alternator? Or is there other electrical stuff > > > that has to do with the engine staying running? > > > > > > > > > > > > > > > > > > On Oct 29, 2009, at 9:02 AM, ANDY PERAKES wrote: > > > > > > > I tend to agree with the electrical suspect. Fuel/air problems > > > > generally linger a bit and don't result in an immediate drop-out > > > > like you describe. Anything is possible though. I like the > > > > guidance Lee sent out awhile back where he said to eleiminate the > > > > possibility of electrical problems first since that's usually > > > > quicker and easier to do. Trouble is, intermittent electrical > > > > problems can be a nightmare to trace. Is there any possibility of > > > > hooking up some basic instrumentation to see if there is any > > > > electrical effect when it happens? If you see a sudden voltage > > > > change or current drop out, that would be a clear indicator. Good > > > > luck! > > > > > > > > Andy > > > > '67 Reveler > > > > > > > > > > > > ----- Original Message ----- > > > > From: "jd" <jdood@...> > > > > To: "Evinrude & Johnson Boats of the 1960's and 70's" <omc-boats@... > > > > > > > > > Sent: Thursday, October 29, 2009 11:44:16 AM GMT -05:00 US/Canada > > > > Eastern > > > > Subject: [OMC-Boats] engine wierdness > > > > > > > > took my boat out for the last of possible testing this season > > before > > > > things get too cold and rainy. didn't go as i hoped. i'll > > > > try and condense this down to it's simplest form: > > > > > > > > BEFORE (about a month ago): > > > > > > > > except for some slightly fast idling, engine ran well. Then I > > > > noticed it starting to do this weird intermittent thing where > > all the > > > > power (throttle) would just drop down to zero. It seemed to happen > > > > mainly during acceleration up to plane. This all was happening at > > > > the end of the season, so I have pretty much had the boat > > sitting for > > > > the past month waiting for parts and time. But I was thinking it > > was > > > > related to my falling apart carb and / or and electrical thing > > > > related to my rebuilt shifter switch. so...... > > > > > > > > AFTER (yesterday): > > > > > > > > - I installed my nice practically new carb (rebuilt by flying > > fish). > > > > keep in mind, it was the exact same carb i have always had on the > > > > boat, just completely rebuilt. I also changed my air water > > separator > > > > cartridge beforehand to avoid any chance of issues from fuel > > that had > > > > sat for a month. > > > > > > > > - I installed a NOS shifter switch that I recently acquired. > > Tested > > > > with light after install, everything checked out. And as I said, > > > > it's basically new. > > > > > > > > > > > > So after those two major upgrades, the engine is doing the same > > dang > > > > thing. Started up, let it warm up a bit, took it for a spin. > > > > About 5-10 seconds after getting up on that first plane everything > > > > just dropped down to zero and unlike the past times, this time the > > > > engine died at the same time. Had to crank it over several times > > > > for it to start back up, and when it did, with the red lever set > > at > > > > full throttle it took several seconds for the RPMS to climb up to > > > > where they should be. I limped back to the dock. > > > > > > > > Then while at the dock idling for a few minutes, all of the sudden > > > > it just died again. At idle this time, not while accelerating. > > > > And every time it dies it is quick. It's not like it sits there > > and > > > > slowly dies. It just cuts out suddenly. So I of course tried to > > > > restart it. Nothing for several tries, then it acted like it was > > > > going to start, then it finally starts, coughing and sputtering a > > > > bit, then very slowly climbs up to full throttle (in neutral). > > > > I started thinking maybe a fuel pump issue. Disconnected fuel > > > > line, cranked engine, plenty of pumping of fuel happening. > > > > > > > > It seems sort of electrical in the way it just all of the sudden > > dies > > > > either at idle or accelerating. Yet when it finally starts back > > up it > > > > coughs and sputters and smokes a bit. Which sounds like bad fuel, > > > > yet I have a new water/fuel separator cartridge, the carb is new, > > > > and nothing looks dirty with the inline regular fuel filter. > > > > > > > > > > > > Any ideas? > > > > > > > > > > > > > > > > > > > > _______________________________________________ > > > > OMC-Boats mailing list > > > > OMC-Boats@... > > > > http://lists.ultimate.com/mailman/listinfo/omc-boats > > > > _______________________________________________ > > > > OMC-Boats mailing list > > > > OMC-Boats@... > > > > http://lists.ultimate.com/mailman/listinfo/omc-boats > > > > > > _______________________________________________ > > > OMC-Boats mailing list > > > OMC-Boats@...mate.com > > > http://lists.ultimate.com/mailman/listinfo/omc-boats > > > > Windows 7: It helps you do more. Explore Windows 7. > > _______________________________________________ > > OMC-Boats mailing list > > OMC-Boats@... > > http://lists.ultimate.com/mailman/listinfo/omc-boats > > _______________________________________________ > OMC-Boats mailing list > OMC-Boats@...imate.com > http://lists.ultimate.com/mailman/listinfo/omc-boats <hr />New Windows 7: Find the right PC for you. <a href='http://www.microsoft.com/windows/pc-scout/default.aspx?CBID=wl&ocid=PID24727::T:WLMTAGL:ON:WL:en-US:WWL_WIN_pcscout:102009' target='_new'>Learn more.</a></body>
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Received on Thursday, 29 October 2009