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 10:41:34 -0700

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@...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

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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@...ts.ultimate.com > > http://lists.ultimate.com/mailman/listinfo/omc-boats > > _______________________________________________ > > OMC-Boats mailing list > > OMC-Boats@...ltimate.com > > http://lists.ultimate.com/mailman/listinfo/omc-boats > > _______________________________________________ > OMC-Boats mailing list > OMC-Boats@... > http://lists.ultimate.com/mailman/listinfo/omc-boats <hr />Windows 7: It helps you do more. <a href='http://www.microsoft.com/Windows/windows-7/default.aspx?ocid=PID24727::T:WLMTAGL:ON:WL:en-US:WWL_WIN_evergreen3:102009' target='_new'>Explore Windows 7.</a></body>
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Received on Thursday, 29 October 2009