Hot exhaust?

[Southtowns27]

Hey guys, I just got the boat in the water for the first time this year. Yes, I know it's the middle of August, but I just got off my ship 2 weeks ago. Anyway, I did all the routine maintenance and test ran it on the muffs at home. (Boat is an '86 Wellcraft 260 Aft Cabin, Chevy 350/Alpha 1). Everything seemed normal so I splashed it this afternoon. I let it warm up for quite awhile at the launch ramp while I looked over everything just to make sure there were no leaks or anything else amiss. I had the engine at about 1800 RPM at the time, and I noticed that one exhaust pipe was hotter than the other. The top of both risers were pretty warm, but the hoses going into them were cold. The engine temp gauge was reading 140 and it never gets much higher than that. The section of exhaust in question is from behind the riser and the vertical section that drops down to the Y pipe. The right side was warm to the touch, the left side seemed really hot. I could hold my hand on it, but not for more than 10 seconds. How hot do/should the exhaust pipes get? I guess something could be crudded up someplace, but I'm in fresh water so we tend not to get big corrosion issues. The thing may well have been this way for quite awhile and I just now noticed it. I changed the water pump in the outdrive 2 years ago, but the boat doesn't have many hours on it since then. Am I worried about nothing? If it is something, where should I start? Thanks in advance!

 

[alldodge]

Hey guys, I just got the boat in the water for the first time this year. Yes, I know it's the middle of August, but I just got off my ship 2 weeks ago. Anyway, I did all the routine maintenance and test ran it on the muffs at home. (Boat is an '86 Wellcraft 260 Aft Cabin, Chevy 350/Alpha 1). Everything seemed normal so I splashed it this afternoon. I let it warm up for quite awhile at the launch ramp while I looked over everything just to make sure there were no leaks or anything else amiss. I had the engine at about 1800 RPM at the time, and I noticed that one exhaust pipe was hotter than the other. The top of both risers were pretty warm, but the hoses going into them were cold. The engine temp gauge was reading 140 and it never gets much higher than that. The section of exhaust in question is from behind the riser and the vertical section that drops down to the Y pipe. The right side was warm to the touch, the left side seemed really hot. I could hold my hand on it, but not for more than 10 seconds. How hot do/should the exhaust pipes get? I guess something could be crudded up someplace, but I'm in fresh water so we tend not to get big corrosion issues. The thing may well have been this way for quite awhile and I just now noticed it. I changed the water pump in the outdrive 2 years ago, but the boat doesn't have many hours on it since then. Am I worried about nothing? If it is something, where should I start? Thanks in advance!

Nothing wrong, one side will always be hotter then the other. Being able to put your hand on it for even 2 seconds without being burned is normal. It's just hydraulics, one side gets more water then the other because of flow to the path of least resistance.

Fair winds and following seas for your next trip, and may all your skies at night be red

 

[Bondo]

How hot do/should the exhaust pipes get?

Ayuh,.... Considerably Hotter than I find comfortable,.....

The sides are never the same,....

But, at 2 years, the impeller is gettin' ole,....
Sittin' is worse than runnin' with rubber parts,....

 

[Southtowns27]

Thanks guys. You saved my weekend at least (I'm sitting on the boat in the slip as I type this). I'll run her this week but throw a pump kit in it before next weekend. Thanks again.