trainfan1 wrote:
markvictor wrote:

trainfan1 wrote:

markvictor wrote:

EFI? brand new alpha? are you in base timing mode?


Who are you responding to? What are you responding to? Who said EFI?

You're confusing yourself immensley.

Take for example a brand new Alpha 135. Disconnect the interrupter.
Guess what? It wont come out of gear, even at idle(in water, under
way), unless you use the cable and pull the shift lever past neutral
into reverse... then guess what? you're in reverse! From neutral, it'll
go INTO gear all day long no matter how fast you shift & throttle(&
actually, the faster you shift the better for the dog & gears in the
foot - none of that chunka-chunka-chunka-chunka-clunk stuff...).

Makes docking tough.

Now connect the interrupter on our EXAMPLE brand new Alpha 135. Shifts
like a dream(at least as good as a dog clutch leg can)!

You obviously do not understand the need for an interrupter on the Alpha
leg. (135hp is a carb engine)

It's for getting out of gear, in water. Engine running. Period.

Not running, or on the flush muffs, you don't need the interrupter, in
fact it shouldn't even activate... it's action is based on the force
needed to overcome the resistance of a drive working against the water,
the ratcheted clutch dog teeth embedded into the drive gear, which is
the exact problem the OP has.

Now he's telling us the idle is twice as high as it should be, which
compounds the problem - even more force demanded of that lower shift
cable. Without the interrupter, he's headed for a docking, trailering,
or maneuvering disaster.

Rob


So like I said, he needs to set the idle correctly and adjust his cable
correctly and that will most likely permit his drive to shift correctly
The only thing confusing me is the the notion that a fixed ratio drive
with a positive engagement clutch can have a change in engine speed
relative to shaft speed while the clutch is engaged...
Immensely only has 2 "e"s


1st, you are misunderstanding the statement. Water flow over the prop
while decelerating will unload the drivetrain - will try to "push" the
engine - such that the interrupter will not come into play. Gear ratio
has nothing to do with it. This is what is happening to the OP on the
flush muffs, too... no load - no interrupter needed.

2nd, the Alpha clutch dog gears are back-cut and ramped, so that if the
prop is "overturned" it will "skip" teeth. Gear ratio has nothing to do
with it.

http://marineengineparts.com/shopsit...ia/18-2202.jpg

Rob

If you took the time to read my post, you would have known that I
understand that perfectly as I stated that the water underway would
unload the clutch, read before you reply...
also note the update from the original poster about the lack of effort
when the shifter DOES return to the neutral detent, and the drive
remains engaged... experience gained from the 5 hundred drives or so
that come through our shop each year tells me that by adjusting the
shift cable end to the factory position at the bottom of the oval slot
will usually solve the symptoms described if the idle is correct...Not
always, of course, but any good tech will adjust to spec before
recommending parts changing...The interrupt actuates due to high clutch
load, or false load caused by a cable, or a bushing or shaft problem,
not just as a matter of course.. the poster stated that he does
occasionally have interrupter activation, but the drive remains in gear
when the control lever is in neutral, so again, I would look at cable
adjustment at the cantilever for correct throw and set idle to spec...