Re: onan genset

caramel02uk <pjn.mccallin@...>

dear ken
thanks for the advice, I do not have the type of solonoid you have
described but there is one fitted just below the starter on the
negative side, so I guess this is the problem. I now have an
occasional problem in stopping the yanmar 100 hp; not alwase but
occasionaly when I press the stop button nothing happens. Just above
the fuel pump there is a solinoid/relay again on the neg side , do
you think it is the same problem - sticking. The yacht was laid up
for almost 17 months although the batteries were perminantly hooked
up to shore power the engine and genset were mothballed.Thanks
--- In, "Ken & Nancy Burnap"
<notrevie2000@y...> wrote:

--- In, "caramel02uk"
<pjn.mccallin@j...> wrote:

can anyone assist please, after only 450 hours use, the gen set
becoming difficult to start. On pressing the start button there
lots of clicks from the various relays and the fuel pump but
happens, no cranking,nada. Repeat the process and it will start
after say four or five presses of the button. Have checked all
leads starter connections am now stumped and wonder if a similar
problem has been encountered. Thanks in advance Patrick
Amel has taken the prevention on galvanic action one step beyond
other boat mfg. They not only have an interrupt solenoid in the
positive circuit for the motor but they also have one on the
negative circuit. When the start button is pushed both of these
solenoids must engage at the same time for the motor to start.
cause of your problem is almost assuredly because the negative
solenoid is sticking. The good news is, it's easy to get to and
short stop around. It is in plain sight on the port side of the
engine, a cylinder shape about 1.25" dia. X 6" long, with a rubber
push button on either the top or the bottom depending on how it
mounted. It has been mounted in various positions in an attempt
lessen this probability of it's sticking. The next time this
happens, have one person hold down the rubber push button on the
solenoid while a second person pushes the start button. That's
You obviously could short across the terminals as a permanent fix
but I would not recommend this, I think the second interrupt is a
good idea when it works. I found that the sticking problem
when the engine was fairly hot after an extended run and not given
enough idle time to cool down before shutting it off..

Hope this helps.

Ken Burnap
s/v Notre Vie

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