Arrow Starter Problem

On Tue, 27 Sep 2005 09:20:12 -0700, unicate wrote:

Writing for a friend with an Arrow that is having a recurring starter
problem. The battery has been charged and tested, everything else checks
out, and there is the right amount of voltage at the starter. It works
once or twice (in a row), then if left overnight, it won't restart (no
response from starter whatsoever). The starter has been replaced three
times with the same result -- starts right up on the first few tries,
but next day, it won't restart.

Anyone else experience this?
Thanks in advance.


Was the voltage at the starter checked while the engine was cranking?
Was the voltage at the starter checked when the starter was not responding?

Were the starters examined after they failed to function (bench test) to
see WHY they malfunctioned?



Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)

Agree with these posts. A likely culprit is the cabling, or specifically
corrosion in the cabling, from battery to engine compartment.

If there's plenty of voltage on the first few starts, and then the starter
won't turn, you've probably got a drain on the electrical system that's
bringing the battery down. Check for shorts or continuity through anything
that's not on the master switch -- panel clock? Gear motor?

My Comanche was running the battery down and we finally traced it to a
faulty microswitch in the landing gear -- the gear motor wasn't turning off
at the end of the gear travel, so it was pulling current even with the rotor
parked.

Remember that motors are less efficient when hot -- so your starter motor
will draw more current on a hot start even though the oil is thin.

Onward.

Seth
N8100R

"Ron Rosenfeld" wrote in message
...
On Tue, 27 Sep 2005 09:20:12 -0700, unicate wrote:

Writing for a friend with an Arrow that is having a recurring starter
problem. The battery has been charged and tested, everything else checks
out, and there is the right amount of voltage at the starter. It works
once or twice (in a row), then if left overnight, it won't restart (no
response from starter whatsoever). The starter has been replaced three
times with the same result -- starts right up on the first few tries,
but next day, it won't restart.

Anyone else experience this?
Thanks in advance.


Was the voltage at the starter checked while the engine was cranking?
Was the voltage at the starter checked when the starter was not
responding?

Were the starters examined after they failed to function (bench test) to
see WHY they malfunctioned?



Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)

"Seth Masia" wrote:
If there's plenty of voltage on the first few starts, and then the starter
won't turn, you've probably got a drain on the electrical system that's
bringing the battery down.

But everything else fed by the battery works just fine, even the next
day when the starter doesn't respond at all.

I don't know *all* the particulars, just thought someone may have had a
similar experience. The initial starter was bench-tested fine, put back
in, started a few times, then after a day, no response. Replaced with
"gear starter" with same results (initial start-up successful but no
response 24 hours later). Again, everything else tested and run by the
battery during preflight works fine.

Remember that motors are less efficient when hot -- so
your starter motor will draw more current on a hot start
even though the oil is thin.

Both successful and failing start-ups were done first thing in the
morning, after the airplane was parked all night.

Thanks to all for responding.

On Tue, 27 Sep 2005 22:10:12 -0700, unicate wrote:

But everything else fed by the battery works just fine, even the next
day when the starter doesn't respond at all.

The starter is the heaviest, single draw that you have on the battery. It
would not be unusual for it not to be able to draw enough power, perhaps a
combination of sub optimal battery charge level, sub-optimal cabling and/or
connections, and still be able to run other electrical components.

The fact that the starter works OK on the bench after malfunctioning in the
a/c points to a another issue.

For example, a bad starter solenoid may work intermittently. A bad
ignition switch may fail to make the contact to close the solenoid.

If the problem is either of the above, you should hear nothing (no starter
solenoid click) and there should be zero voltage at the starter wires
during the instances when it malfunctions.


Ron (EPM) (N5843Q, Mooney M20E) (CP, ASEL, ASES, IA)