Tach issue (reading when engine off)

B

BuckeyePEV

New Member
Sep 7, 2019
12
Boat Info
1994 220 Signature Bowrider
Engines
5.7 Mercruiser
I noticed this on mine. When the engine is off, it shows 1,000 rpm.

Looking at pictures online, it seems a lot of boats from the 90s have this same issue.

Is this fixable, or is it probably faulty (which is fine)....just didn't know if there's a quick fix.
 
it happens to mine if I turn the engine off by switching off the breaker first instead of key switch
 
BuckeyePEV said:
I noticed this on mine. When the engine is off, it shows 1,000 rpm.

Looking at pictures online, it seems a lot of boats from the 90s have this same issue.

Is this fixable, or is it probably faulty (which is fine)....just didn't know if there's a quick fix.
Click to expand...

If it's only the tach,... it's a GM thing.
 
How does it work with the engine ON? I'm not usually all that worried about how the tach works when the engine is off, you know? ;) You could clean the contacts (and then exercise the selector switch)... "maybe" it will help. Otherwise, it is what it is.
 
Last edited:
Actually I was reading online and I think it reads at the last RMP you shut the engine off.....if you turn key to battery only, then turn it off, it goes back to zero.

I'm considered a rookie, so once I get back to my boat I'll see if this works......all shrink-wrapped for now.
 
BuckeyePEV said:
I noticed this on mine. When the engine is off, it shows 1,000 rpm.

Looking at pictures online, it seems a lot of boats from the 90s have this same issue.

Is this fixable, or is it probably faulty (which is fine)....just didn't know if there's a quick fix.
Click to expand...
It’s not a bug, it’s a feature. Serious. It’s normal. Least of your boat issues.
 
BuckeyePEV said:
Actually I was reading online and I think it reads at the last RMP you shut the engine off.....if you turn key to battery only, then turn it off, it goes back to zero.
Click to expand...

Mine does the exact same thing. After I turn the engine off I always turn the key back to "On" and then "Off" to drop the tachometer needle to zero. I know it doesn't matter, but it just bothers me seeing the needle at 1000 rpm.
 
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