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Evinrude Problems
Randy,
Thank you in advance for providing this forum and resource.
I have a 1988 Evinrude 88hp v4 (oil goes in the gas) that is used on a
Starcraft 1600. The boat sees very limited use each summer on a
fresh water lake. Each year, before setting it up on terra firma for
the winter, we put Sta-Bil in the gas and run it around the lake for a few
miles. Each spring, we change the lower unit lube and set her out
again. This spring, we did the usual routine but the motor is having
problems:
On initial startup, using the cold start (choke), the motor turns over but
the cold start rpm's are lower than it should be. After a few
seconds, the rpms drop to what would be a normal idle without the choke
in. If I take the cold start
off, the motor dies. I can restart it as many times as I want with
the same effect. The motor is also producing lots of noxious white
smoke when it is running.
I pulled all 4 plugs (which as brand new Champions, gapped to .040) and
they are all fouled. The top two cylinders are worse and look like
they never fired. The bottoms
are also washed over with gas but not as bad. The wires (primary and
secondary) off the coil packs look excellent and there is no corrosion on
any terminals. The coil packs' RTV has some fissures in the RTV but
otherwise look OK.
The carb has never been off the motor and is possibly varnished up inside.
The fuel filter screen is clean. Didn't see anything in the manual
for the motor that speaks of an air filter. Not sure what is holding
the motor back - fuel, air or spark.
What is your likely suspect and what can I check?
Thanks!
Jon
Jon,
Either the top carb is flowing over or the trigger for the top 2 cylinders
is weak. This may or may not be the case, but I would start there.
Randy
Please submit
whatever questions you have to IHRTechTalk@yahoo.com.
All questions and answers selected will be displayed on this page as they
come in. Note: though all boaters are welcome, priority may be given to
I.H.R.
members. Randy can not be held responsible for any advice
given. Though his information and expertise is second to none, he
has no control over what you do with your boat. It is up to you to
boat safely and act responsibly, and his advice is only to be used as a
guidance for your high performance boat/motor of which you are the one
responsible for the risks involved.
Thanks,
Mark C.
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