Rixram
New Member
- May 28, 2013
- 96
- Boat Info
- '93 Monterey SEL 286
- Engines
- 2x 205 HP 4.3L V-6, Alpha-1 G-2
Heya crew!
I bought a 1987 Sea Ray Seville II MC last month. I knew it had a cooling issue when I bought it, but the PO was not mechanically inclined. Hence, I got a good deal on the boat. The engine was replaced in 2005, and is the 4-barrel 205HP version. Compression checks on the engine were all within marine specifications.
Off the bat, I made the presumption that the impeller needed replacing (and this was confirmed once I got a look at the old one). I got that back together a few days ago (replaced the bellows as well). I went to op-test yesterday (I trailer the boat) with a set of mouse ears.
All was fine....for a while. Temp was holding pretty low. I went off to put the new registration numbers on the bow. When I returned, the engine was at about 200 degrees. The water coming out of the drive was hot. I shut it down, and immediately went to the thermostat. Glad I did, because this thing has a 180 degree t-stat in it. I am picking up a 142 degree one in a little bit.
My question is this: at idle, with no load on the engine, would having a 180 degree t-stat let the engine get this hot? I wouldn't think so. As a precaution, I intend to replace the circ pump on the front of the engine, thinking that perhaps the current circ pump may be detoriated with possible corrosion.
So, for the cooling system, I have already replaced the Alpha-1 impeller and pump housing (and bellows, but that part is immaterial to this issue). I am replacing the 180 degree t-stat with the correct 142 degree unit. I am replacing the circ pump, mostly as a precaution. Is there anything else that ya'll reccommend? I want to take the Mrs out for the first run this weekend, and *really* do not want her to have an unpleasant first experience.
Thank you in advance for your input.
I bought a 1987 Sea Ray Seville II MC last month. I knew it had a cooling issue when I bought it, but the PO was not mechanically inclined. Hence, I got a good deal on the boat. The engine was replaced in 2005, and is the 4-barrel 205HP version. Compression checks on the engine were all within marine specifications.
Off the bat, I made the presumption that the impeller needed replacing (and this was confirmed once I got a look at the old one). I got that back together a few days ago (replaced the bellows as well). I went to op-test yesterday (I trailer the boat) with a set of mouse ears.
All was fine....for a while. Temp was holding pretty low. I went off to put the new registration numbers on the bow. When I returned, the engine was at about 200 degrees. The water coming out of the drive was hot. I shut it down, and immediately went to the thermostat. Glad I did, because this thing has a 180 degree t-stat in it. I am picking up a 142 degree one in a little bit.
My question is this: at idle, with no load on the engine, would having a 180 degree t-stat let the engine get this hot? I wouldn't think so. As a precaution, I intend to replace the circ pump on the front of the engine, thinking that perhaps the current circ pump may be detoriated with possible corrosion.
So, for the cooling system, I have already replaced the Alpha-1 impeller and pump housing (and bellows, but that part is immaterial to this issue). I am replacing the 180 degree t-stat with the correct 142 degree unit. I am replacing the circ pump, mostly as a precaution. Is there anything else that ya'll reccommend? I want to take the Mrs out for the first run this weekend, and *really* do not want her to have an unpleasant first experience.
Thank you in advance for your input.
