Bob,
This is just a guess, but something very similar happened to my boat. I
could warm it up at the house for an hour. It would rev up fine, idle fine,
all around run great. Then I put it in the water and put it under load it
would cut out and miss. The problem was the coil. It was shorting out
through the mount. The simple check is to cut a piece of an old bike
inner-tube and slip over the coil, between the coil and the mount thus
insulating it from ground. If this makes a difference, replace the coil. If
not, well I tried.
Good luck,
Dave
SRL311-10444
NOWROC
Stanwood WA.
sunny and warm
something must be broke. :-)
----- Original Message -----
From: Robert Porter <drrebob@usnetway.com>
To: Roadster List <datsun-roadsters@autox.team.net>
Sent: Saturday, July 15, 2000 4:36 PM
Subject: Performance puzzle
> This one is really giving me headaches. My 70 1600 starts immediately,
runs
> great and accelerates normally for about 20 - 25 minutes, then starts
> hesitating on acceleration, backfiring, etc. Gas lines clean, fuel
pressure
> ok; carbs look good, pistons rising together, etc.; water temp ok.
Replaced
> the condensor and checked the timing, which also sees to be advancing ok.
>
> When I unhooked the voltage regulator, the problem went away, so naturally
I
> bought a new regulator, only to see the problem persist. I did notice
when
> reinstalling the alternator that the "A" post rotated when I tightened
the
> nut. Could a loose anode on the alternator be the cause?
> Is this something that shows up as the engine heats up, and if so, would
an
> alternator test reveal the problem? (I ask because mine is still nestled
> down by the header, and not real easy to R&R.)
>
> If not the alternator, what else, could be giving me grief?
>
> Appreciating your thoughts and suggestions,
>
> Bob Porter
> Harrisburg PA
>
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