1 more 1st day back out q

K

krisnowicki

Lieutenant Junior Grade
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Jul 11, 2007
Messages
1,172
I just replaced my impeller and all day the temp was between 140-160 ( I have thru hulls). However, I have two oil pressure gauges one on the dash and a back up on the engine. The one on the dash read about 20-25lbs all day the one on the engine read about 20 at idle and around 35 under way. Is 35lbs normal and good? If the on dash is right would the 25maybe 27lbs be ok? And finally if it was low wouldn't the engine be running hot?
 
R

rndn

Commander
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May 20, 2007
Messages
2,323
Re: 1 more 1st day back out q

krisnowicki said:
I just replaced my impeller and all day the temp was between 140-160 ( I have thru hulls). However, I have two oil pressure gauges one on the dash and a back up on the engine. The one on the dash read about 20-25lbs all day the one on the engine read about 20 at idle and around 35 under way. Is 35lbs normal and good? If the on dash is right would the 25maybe 27lbs be ok? And finally if it was low wouldn't the engine be running hot?
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You talk about an impeller and then state you have two oil pressure guages. The impeller pumps water to cool your engine and the oil pressure guages measure the oil pressure while it is being pumped by the oil pump throughout your engine. You're talking about two entirely different systems.
 
Haut Medoc

Haut Medoc

Supreme Mariner
Joined
Jun 29, 2004
Messages
10,645
Re: 1 more 1st day back out q

krisnowicki said:
I just replaced my impeller and all day the temp was between 140-160 ( I have thru hulls). However, I have two oil pressure gauges one on the dash and a back up on the engine. The one on the dash read about 20-25lbs all day the one on the engine read about 20 at idle and around 35 under way. Is 35lbs normal and good? If the on dash is right would the 25maybe 27lbs be ok? And finally if it was low wouldn't the engine be running hot?
Click to expand...
35 # is OK....;)
It would have to be very low pressure or very low on oil to create a mechanical overheat as long as your cooling system is functioning properly.....
IE, the temp gauge might say 160, but your pistons are melting....
Won't happen with 35 or 27 psi......;)
 
W

WizeOne

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Mar 23, 2008
Messages
2,097
Re: 1 more 1st day back out q

Lack of oil will cause it to start a knockin an rattlin b4 you would see any signifigant rise in water temp.

Sounds like you must have a chebby in that tub. 20-35 is pretty normal. My Ferd runs between 40-70#'s
 
Bondo

Bondo

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Messages
71,459
Re: 1 more 1st day back out q

Ayuh,.......

10psi per 1000rpms is considered acceptable........For a Chevy.......
 
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