cooling system

Hey guys first year with my boat and I have had good luck with everything working up until now. My seawater pump cracked on the housing that holds the impeller. I replaced the impeller and housing and when I got everything set back up there was a leak coming out of the side of the seawater pump...

I bought a 1999 Sea Ray Express Cruise with the Mercruiser 5.0 EFI. It has a closed cooling system. I have been working on it for a while and changed the zincs, impeller, oil, and water separator filter. Topped off the radiator fluid. I hooked the water hose up to the stern drive seems to be...

Just started up the motor for the first time this season,all fluids have been replaced,the hose hooked up with good water pressure. The oil pressure is at 45 lbs at idle ,temp slowly climbed to 190* and held there for a few minutes then the alarm went off, heat Gun showed 190* at the t stat...

I just bought a 1997 Sea Ray 175 3.0 merc Alpha One. I was just feeling how soft the water hoses were by squeezing them and the elbow at the pump crunched. I took it off and found this: Should I pull the manifold and other cooling parts clean or replace? Is this the manifold flaking...

When I purchased the 1995 330DA it had raw water cooled Jasper long blocks with 1 hour on them. I installed full system (manifolds too) fresh water cooling kits not knowing if I'd ever end up in salt water and to feel good. Some of the boats I am looking at now to buy are raw water cooled...

Hey guys i have a 1978 srv 260 with twin 470s.. both engines run top knotch. My issue is with the cooling system one engine temperature gauge creeps up and up and up until i pull it back off plane. I can run them both at 2500 or less there fine as soon as it starts pushing water to plane it...

i have a 91 454 mercruiser with a bravo one drive. :huh: 1) I recently had my inlet raw sea water pump freeze up with one person said was gasketish material in the pump. it was about 1/4 inch clump of gasket like material with fibers. is there anything with a gasket from the intake on...