Low Operating Temp (Rinker 232)

[rocklydockly]

I have a '95 Mercruiser 5.7L carb'd with Bravo 3, raw water cooled. I had it at the lake for 4 days last week and operating temp never got above 130. It didn't seem real strong when towing skier or tubes, but I thought that was the high altitude 5,000'.<br /><br />Should this be a big concern? What would cause a boat to operate at low temp?

 

[rattana]

Re: Low Operating Temp (Rinker 232)

The thermostat could be stuck open. Most times they will fail open. It also could be missing, someone may have removed it.

 

[reference123]

Re: Low Operating Temp (Rinker 232)

Our 02 Rinker Siesta with the 350 mag and bravo 3 drive usually runs about 140 at 5000 feet. So you are not too far off.

 

[crazy charlie]

Re: Low Operating Temp (Rinker 232)

I would not worry about it.If the stat was stuck open or it was missing, the motor would run even cooler than that.143 is normal so you are better off a little cooler than a little higher.Charlie