On Jul 8, 1:48 pm, Tim wrote:
On Jul 8, 12:11 pm, "Jim" wrote:
"Tim" wrote in message
oups.com...
| On Jul 8, 11:52 am, Tim wrote:
| On Jul 7, 12:02 pm, wrote:
|
|
|
| A buddy of mine has a Crownline 20 foot bowrider, with quicksilver
| commander 3000 controls, a 350 MPI engine... at times, the engine
| won't fire or crank no click or nothing, however all electronics on
| board work properly. I.E. Bildge, blower, hatch, trim lights stereo
| so on so fourth, and when you take the power control lever, and run
| it full forward and full reverse then return it to neutral while the
| key is off, the engine will fire up right away.... I'm tempted to
| tell him to check the wires to the ignition switch from the neutral
| lock out switch, or the switch itself.. anyone have similar
| troubles?... how did it get resolved?..
|
| Thanks.- Hide quoted text -
|
| - Show quoted text -
|
| Hmm, I don't kwow how that happened. I hit reply and it made a blank
| post!
|
| Anyhow, I thinkt he problem is in the momentary kill switch.
| Mercruiser has a "kill" switch built into the mechanism, that will all
| the engin to be momtarily shut off while shifting to forward or
| reverse, to allow the gears to mech properly without any engine load.
| I feel it's not defective, but needs adjustment, but if it's
| defective, it's holding "open" untill the shift mechanism jars it
| loose.
|
| just an opinion.
|
|
That's a popular opinion but couldn't be further from the truth. The shift
interrupter will only cause the engine to stumble when pulling OUT of gear.
99.9% of the time that it closes and kills the ignition is because of a
problem with the lower cable or linkage.
I stand corrected.
Pulled this from another board:
"The switch in question is common to many engines. What it does is to
momentarily kill the engine, only for a few milliseconds, as the
clutch dog or cone disengages. For a brief moment while the clutch
mechanism is moving, its teeth or surfaces are only just on the verge
of being engaged, and if a power pulse from the engine coincides with
this instant, a bit of metal can be scraped off of the clutch
mechanism. So by killing the engine for a few milliseconds as the
clutch moves, we can guarantee that no power pulse will coincide with
that instant where the mechanism is most vulnerable. Once the clutch
has moved, the spark plugs get their power back and the engine keeps
on turning. (All of this should happen in less than a couple of
revolutions, usually, and so the engine doesn't actually stop
turning.)
What we have here appears to be that the momentary-kill switch is
jammed, and so does not return to its normal position quickly enough
after the shift. I would suggest thoroughly inspecting all throttle/
shift connections and cables, then replacing the switch...."- Hide quoted text -
- Show quoted text -
I really apreciate the help everyone, but I don't think the fix that
has been suggested is an accurate one. as his problem doens't happen
when the engine is running, it happens when he tries to start the
engine. the symptoms he experiences are very similar to a dead car
battery, but you can't hear anything clicking or even trying to
work. play with the power controls go all forward to all reverse
then to neutral again and then it starts right away. this is the
sort of problem that happens when launching at a marina... he is
quite embarrassed.... I told him to buy a Checkmate.
all kidding aside, I told him I'd do some fishing for him, but looks
like he's gonna have to go to the Merc dealer for his anual rape
session... unless ofcourse someone has any other ideas besides that
kill switch....?
thanks!