Re: [OMC-Boats] engine wierdness

On Oct 29, 2009, at 11:19 AM, Kenneth Gullicksen wrote:

> I had similar issues when E10 gas was first introduced (turned out
> to be from separation, I was getting a bit of water in the tank from
> a leaking o-ring on the fill). It would run okay, poorly or not at
> all depending on how long the gas was in the tank and how much water
> got in there.) What are you using for a gas tank? Can you switch to
> another tank with fresh, clean gas?

well, fairly new gas in a plastic tank that's about 3 yrs old.

> Unless caused by a bad connection most electrical problems are more
> consistent than what you describe but I would probably try a new
> coil if you have eliminated all aspects of fuel and fuel flow being
> an issue.

yeah, maybe the coil then.
>
>
> -----Original Message-----
> From: omc-boats-bounces@... [mailto:omc-boats-bounces@...
> ] On Behalf Of jd
> Sent: Thursday, October 29, 2009 1:01 PM
> To: Evinrude & Johnson Boats of the 1960's and 70's
> 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@...
> http://lists.ultimate.com/mailman/listinfo/omc-boats
> _______________________________________________
> OMC-Boats mailing list
> OMC-Boats@...
> http://lists.ultimate.com/mailman/listinfo/omc-boats
Received on Thursday, 29 October 2009