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John H. John  H. is offline
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First recorded activity by BoatBanter: Nov 2009
Posts: 183
Default Merc tach question

On Wed, 11 Nov 2009 18:00:11 -0500, Jim wrote:

SteveB wrote:
I started ripping and tearing today on my Lund, replacing plywood, wiring,
and just junk that went nowhere and did nothing. Got a good start on it.

On the tach, I was surprised to find a vacuum line. The globe on the
tachometer is foggy, so I don't have a clue if this was functioning or not.
I was surprised that a tach would be vacuum operated. A VERY long line from
motor to dial.

A couple of questions: How can I check this? Just fire it up in a barrel
of water, and see if there is suction? Put a vacuum gauge on there? (I'd
have to buy one.) Or just put a 1/8" end plug from my gardening stuff on a
shortened stub on the motor, and fergaddabout RPM's, which really don't mean
much to me on a 40. I can hear more than a tach can tell me. A new digital
tach from Northern Tools is about $40, and that would just be $40 that I
could spend on carpet or towards a bimini, or towards upholstery material.
Gas even.

Guess I should take some before and after pics to show everyone. Just
making a silk purse out of a sow's ear, but it needed some dressing up, and
mods.

Steve


Are you sure you aren't looking at a speedometer?


GMTA.
--

John H

"Socialism is a philosophy of failure, the creed of ignorance, and the
gospel of envy, its inherent virtue is the equal sharing of misery."

Churchill