Evinrude Motor runs great for 5 minutes then stalls - Ideas ?
Phil Wells
'bogs' down (sorta like its running real rich). I got a brand new
portable tank and mixed the oil perfect but it still will only run for a
few minutes at a time. It starts right back up. Then gas line bulb is
hard so I think its getting the gas ok. Any advice would be greatly
appreciated. Thanks in advance, Phil Wells
Robert S. Macfarlane
Possibilities: the needle in the carburetor could be installed upside
down such that too much fuel flows through and floods the carburetor (we
did this once when fixing a motor).
There's an in-line fuel filter where the gas line enters the power head,
and it could be clogged and not letting enough fuel in (but the fuel
line will have lots of pressure).
It's probably a fuel flow problem, so I'd start walking down the fuel
line and investigate for blockages, clogged areas, and stuck parts in
the carburetor. (The float valve could be stuck closed, too.)
- Rob
Greg Page
|> In article <3pdsnc$1...@news.hboc.com>, Phil Wells <Phil....@hboc.com> wrote:
|> >Has anyone ever had a motor that runs great for a few minutes, then
|> >'bogs' down (sorta like its running real rich). I got a brand new
|> >portable tank and mixed the oil perfect but it still will only run for a
|> >few minutes at a time. It starts right back up. Then gas line bulb is
|> >hard so I think its getting the gas ok. Any advice would be greatly
|> >appreciated. Thanks in advance, Phil Wells
|>
stream, so I could drift back. The cause turned out to be a marginal
ignition coil. WOrked fine when it was cold (and would run for hours
in a test tank, not much real load), but as the engine got hot the
spark would get weak, and then quit completely.
-Greg
David Smith
>
> Has anyone ever had a motor that runs great for a few minutes, then
> 'bogs' down (sorta like its running real rich).
>
>
What does the spark plug look like?
If all is well with these two items you might try cleaning and rebuilding
the carberator.
Wallace McLarty
In article <3pdsnc$1...@news.hboc.com>, Phil Wells (Phil....@hboc.com) writes:
>Has anyone ever had a motor that runs great for a few minutes, then
>portable tank and mixed the oil perfect but it still will only run for a
>few minutes at a time. It starts right back up. Then gas line bulb is
>hard so I think its getting the gas ok. Any advice would be greatly
>appreciated. Thanks in advance, Phil Wells
>
I have come across this before and it turned out that the air inlet
to the fuel tank was not open or not open enough. The brief period
of engine stoppage was just enough time to release the partial
vacuum and allow the engine to be re-started.
Hope this helps!
Wallace.
Greg Jackson
-> down (sorta like its running real rich). I got a brand new portable tank
-> and mixed the oil perfect but it still will only run for a few minutes at a
-> time. It starts right back up. Then gas line bulb is hard so I think its
-> getting the gas ok. Any advice would be greatly appreciated. Thanks in
-> advance, Phil Wells
I had that exact condition, including the gas line bulb aspect. It turned out
to be the ball in the check valve, which is inside the gas line bulb. The
check valve ball had gotten out of its cage and was rolling to the other end of
the gas line bulb, effectively checking flow in the wrong direction.
G. Jackson
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Marcus Bell
says...
>
>-> Has anyone ever had a motor that runs great for a few minutes, then
'bogs'
>-> down (sorta like its running real rich). I got a brand new portable
tank
>-> and mixed the oil perfect but it still will only run for a few minutes
at a
>-> time. It starts right back up. Then gas line bulb is hard so I think
its
>-> getting the gas ok. Any advice would be greatly appreciated. Thanks
in
>-> advance, Phil Wells
>
>I had that exact condition, including the gas line bulb aspect. It turned
out
>to be the ball in the check valve, which is inside the gas line bulb. The
>check valve ball had gotten out of its cage and was rolling to the other
end of
>the gas line bulb, effectively checking flow in the wrong direction.
>
>G. Jackson
>
--
Yes, yes, yes.
Same thing happened here. It was a major pain to debug, and I felt like an
idiot for not figuring it out it sooner. What the hell, I was only 12 at the
time. Borrow a working hose and see if the problem disappears.
Also, look for bubbles in any part of the fuel system that allows you to
see the flowing gas. You didn't mention any data on your engine, like HP,
year, VRO or not, etc. I've had several motors with crankcase
pressure-operated fuel pumps develop a pinhole in the pump diaphragm. This
gave intermittent operation, as well.
-Marcus. (bel...@a1.mscf.upenn.edu)
H & G BROWN
Macfarlane) writes:
>
>In article <3pdsnc$1...@news.hboc.com>, Phil Wells <Phil....@hboc.com>
wrote:
>>Has anyone ever had a motor that runs great for a few minutes, then
>>portable tank and mixed the oil perfect but it still will only run
for a
>>few minutes at a time. It starts right back up. Then gas line bulb
is
>>hard so I think its getting the gas ok. Any advice would be greatly
>>appreciated. Thanks in advance, Phil Wells
>
>There's an in-line fuel filter where the gas line enters the power
head, and it could be clogged and not letting enough fuel in (but the
fuel line will have lots of pressure).
This is exactly what happend to me. Some where back I got some bad gas
with some sediment in it. The filter caught the crap and blocks the
filter. Let the engine sit a while and it would start again until the
filter got clogged up with the crap again. If you have a filter, run
the engine until it stalls, then change the filter before the sediment
drops back into the line. Never had the problem again after I changed
the filter.
Good Luck....
Howard
--
*********************************************
bor...@ix.netcom.com | St. Petersburg Fla.
H & G Brown | Only I Know When
*********************************************
Mark Pickerill
>Has anyone ever had a motor that runs great for a few minutes, then
>'bogs' down (sorta like its running real rich). I got a brand new
>portable tank and mixed the oil perfect but it still will only run for a
>few minutes at a time. It starts right back up. Then gas line bulb is
>hard so I think its getting the gas ok. Any advice would be greatly
>appreciated. Thanks in advance, Phil Wells
Try checking the float in the carb. I had a mini-scooter with this problem
once, the carb was over-filling because the float *sank*.
;*****************************************************************************
;* ___ *
;* / \ Mark D. Pickerill Monterey Bay Aquarium Research Institute *
;*| | ma...@mbari.org (M.B.A.R.I.) *
;* \ / *
;*__\_/__ Servant of Athena ++++++++++++++++++++++++++++++++++++*
;* | Assembly hack extrodinaire + All opinions are my own, and in +*
;* | Diesel engine nut + no way reflect opinions of MBARI +*
;* | Mercedes-Benz enthusiast + "Standard disclaimers apply" +*
;* | ++++++++++++++++++++++++++++++++++++*
;*****************************************************************************
Silicon Sailor
> Has anyone ever had a motor that runs great for a few minutes, then
> 'bogs' down (sorta like its running real rich). I got a brand new
>
Is the motor overheating because of a failed water pump impeller?
Steve
--
/|\
/ | \ "Sailing on a Ship of Fools"
/ | \ - Unknown -
|---------/
~~~~~~~~~~~~~~~~
Robert Drongowski
From: Phil Wells, Phil....@hboc.com
In article <3pdsnc$1...@news.hboc.com> Phil Wells, Phil....@hboc.com
writes:
>Has anyone ever had a motor that runs great for a few minutes, then
>'bogs' down (sorta like its running real rich). I got a brand new
old one??
I found 3 problems with mine having the same problems as you described:
1. THe connector from the fuel line to the engine was bad. THe valve
inside the connector was not working properly.
2. A similar valve which connects to the gas tank was also bad.
3. The hose itself was very hard after years of use, and this also was
part of the problem.
ALl of these amy be part of the problem, as well as input from previous
posters.
Jeffrey Sloane
writes:
>
>In article <3pe002$4...@overload.lbl.gov>, dp...@ux5.lbl.gov (Robert S.
then
>|> >'bogs' down (sorta like its running real rich). I got a brand new
>|> >portable tank and mixed the oil perfect but it still will only run
for a
>|> >few minutes at a time. It starts right back up. Then gas line
bulb is
>|> >hard so I think its getting the gas ok. Any advice would be
greatly
>|> >appreciated. Thanks in advance, Phil Wells
>|>
>I had a motor that did the same thing, so I learned to always start
out up
>stream, so I could drift back. The cause turned out to be a marginal
>ignition coil. WOrked fine when it was cold (and would run for hours
>in a test tank, not much real load), but as the engine got hot the
>spark would get weak, and then quit completely.
>-Greg
Greg,
I just had the same problem on my Evinrude 2hp and had rebuilt the carb
and yet it stalled out after about f minutes. I adjusted the high/low
jets and still no luck. It turned out that there were dirt particles
in the carb yet again. Check it out.
Jeff
Fred Schorken
In article <3plo9u$m...@ixnews3.ix.netcom.com>, <mee...@ix.netcom.com> writes:
wrote:
> >|> >Has anyone ever had a motor that runs great for a few minutes,
> then
> >|> >'bogs' down (sorta like its running real rich).
Greg and Jeff and Phil
Check the fuel lines, they probable need to be replaced. The
rubber is more the likely causing the particals. after cleaning the carb.
and replacing the lines, install a filter in line or if there is one
allready replace it.
good luck
Fred Schorken
mail...@pop.net
Phil Wells
>
>Phil....@hboc.com (Phil Wells) wrote:
>>
>> Has anyone ever had a motor that runs great for a few minutes, then
>> 'bogs' down (sorta like its running real rich).
>>
>>
>What does the spark plug look like?
>
>If all is well with these two items you might try cleaning and
rebuilding
>the carberator.
>
The plugs looked normal , I replaced them just in case they were bad.
I'm using a new tank and it never seems to build up pressure. The bulb
does seem to cave in sometimes. I starting to think its the impellor.
It shoud probably be spitting out more water that it is. I'm kinda
scared of doing the carberator myself, I may have to turn it over to the
pros.
jason g. fish
>Has anyone ever had a motor that runs great for a few minutes, then
>portable tank and mixed the oil perfect but it still will only run for a
>few minutes at a time. It starts right back up. Then gas line bulb is
>hard so I think its getting the gas ok. Any advice would be greatly
>appreciated. Thanks in advance, Phil Wells
>
My experience was exactly the same. Spent a lot of time on the fuel system too.
Should have spent time looking at the ceramic on the spark plugs!!!! One plug
had a hairline crack in the ceramic. After a varied number of minutes, based upon
warm up time, how full-out I would run, the crack would apparently increase just
enough to "bog-down" the engine. You know, running on one of two cylinders is
really crappy!
I replaced the plugs, and wham, it's like a new engine. Always carry spares.
jason.
Graeme Summers
I had a similar problem with an oil injected Johnson 70 (which is
essentially an Evinrude). The motor is designed to stall if
insufficient oil is pumped through. Although we never found the actual
source of our problem (blockage, impellor failure etc), we bypassed the
pump and went back to premixed fuel. We have completed a full boating
season without another hitch.
In future it would be better if you specified the motor model you are
having problems with..... each model has its own intrinsic
weaknesses/problems. I hope the above helps.
Tim Doherty
usally at the most inopportune time. Only by pumping the gasline primimg bulb would
the motor continue to run.
It turned out that the priming bulb was old and cracked and letting air into the gasline.
We replaced the bulb and, voila, no more problem.