Re: 2002 5.7 Volvo Penta Running just above 180 degrees, is that too hot?
It used to always run around 170, last weekend alarm sounded and the computer cut the power, boat was towed back in to prevent further damage. So this past Tuesday I changed impeller and T-Stat, T-stat had some crud on it, impeller looked o.k. but I replaced it anyway. Yesterday I checked temp with IR, it was reading 180 at T-stat while dash gauge was reading about 185. I pulled some hoses at T-stat housing, 1 at a time, and started engine for 1 second each time, strong water pressure shot out each time. I put hoses back on and went for a ride, it ran up over 180 again and went back down, some short time after throttling back down. Starboard riser seemed to have higher temp than port riser. I'm not seeing something here, what am I missing?