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Finding
The Right Spark (19-4)
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 Afriend
and I were discussing spring tune-ups and he was wondering
what the difference is between marine-grade spark plugs
and the automotive type? He was also wondering if it
would hurt to run an engine with automotive plugs?
B. Ellery (e-mail)
(Answer) ...
NO QUICK START
I have a 1997 60 hp Johnson equipped with what is called
Quickstart electronic starting. According to the factory
service manual, the unit will "automatically advance
ignition timing when engine temperature is less than
105 degrees F and for approximately 10 seconds each
time the engine is started independent of temperature."
When I run the engine for a while, then slow down to
trolling speed, the engine revs up to 500 rpm and stays
there! I have gone through the manual diagnostics as
far as I can go without having the factory breakout
box. I have even tested the temperature switch (that
I boiled in oil), and it's fine. While the switch works
by going to ground when the engine warms up, I cut and
ran that switch wire to ground. Now, I no longer have
increased idle speed when starting cold.
I have approached mechanics with this concern and they
simply suggest the thermostat may be sticking and overcooling
the engine at idle. All throttle and shift linkages
are set according to the manual (the throttle is going
right down to the stop). I am a licensed mechanic of
30 years and don't like to throw parts in any machine
without being sure of a diagnosis. Any suggestions would
be greatly appreciated.
K. Barltrop (e-mail)
(Answer) ...
OVER THE TOP
I have a 1987 Evinrude V-4 120 hp outboard engine and
I am looking into having the cowling refinished. Any
ideas where I could get this done?
R. Lurie (e-mail)
(Answer) ...
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