My vote:  "denial".   ;)
Also, measuring battery voltage via the cig socket provides only
part of the story. You're not seeing how well battery performs under load.
(e.g. Amps drawn by starter)

FWIW, on my '88, my rebuilt $$$$ starter has always had a "flat" spot.
What I did: new battery, cleaned grounds, new ground strap at tranny,
new starter bushing in clutch housing, replaced long cable from
battery to starter.
Starter symptoms remained pretty much the same though when it works right,
it spins incredibly fast. Regardless, it still has a slow flat spot
that is exacerbated
by heat after bus driven some time and parked for 20 minutes or more.

There's an interesting article on gowesty about starter core age and
rebuild quality.

I used to think it was silly to do so, but after getting burned on an
overpriced rebuilt,
I now carry a known good spare starter. After I go through stock starters,
I'll either get the adaptor + new starter, or, a modified reduction starter
(no need for adaptor)

Just my .02

Neil.

On 6/26/16, Michael McSwain <michaelmcswain@gmail.com> wrote:

> I also had my battery checked and it checked out fine.  I have one of those
> cigarette lighter volt meters that consistently shows 13.9 volts at speed.
> If it weren't a 1 year old Bosch starter I would have immediately assumed
> that to be the problem. Am I just in denial?

--
Neil n

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