newboaters
New member
"Please bear with me, I'm
"Please bear with me, I'm the clueless wife of a semi-marine-mechanics-educated man who's quickly losing his "cool" because the boat is "hot".
We have a 1987 Imperial 270SF, Mercruiser 454 I/O, Alpha One - Running it in fresh water/Great Lakes. Runs GREAT up to about 2400 rpms. Then the alarm goes off. We've had the thermostat & the water pump kit/impeller replaced and had hoses blown out. They dropped it back in for us and it ran just fine on Saturday. Yesterday (Sunday), we took her out and ran just fine...until about three miles of consistent 2400-2500 rpms and then the alarm went off again. Thinking it didn't happen the day before because we didn't have it at 2400 for as long. ?? Backed down, ran at idle for just a minute and it cools right back down. Took her back into the marina at 2200-2300 rpms all the way....no problems.
We have three different props given to us with the boat. Wondering if a prop could be the culprit?? He was thinking that maybe the prop that's currently on the vessel is working too hard, not pulling enough water in? It's not the original prop for the boat.
*also* - when we got back in our slip yesterday he noticed there was a lot of water being pumped out of the bilge and was not sure why or where it was coming from???
Everyone we've talked to is pretty convinced that it's a simple solution...they're just not exactly sure what it is. They're also pretty confident that it's not an "engine" problem because it's not overheating consistently....meaning that it doesn't happen when it hits 2400 rpms.....only after it's "had enough" at that speed. ???
Thanks for any input you may have."
"Please bear with me, I'm the clueless wife of a semi-marine-mechanics-educated man who's quickly losing his "cool" because the boat is "hot".
We have a 1987 Imperial 270SF, Mercruiser 454 I/O, Alpha One - Running it in fresh water/Great Lakes. Runs GREAT up to about 2400 rpms. Then the alarm goes off. We've had the thermostat & the water pump kit/impeller replaced and had hoses blown out. They dropped it back in for us and it ran just fine on Saturday. Yesterday (Sunday), we took her out and ran just fine...until about three miles of consistent 2400-2500 rpms and then the alarm went off again. Thinking it didn't happen the day before because we didn't have it at 2400 for as long. ?? Backed down, ran at idle for just a minute and it cools right back down. Took her back into the marina at 2200-2300 rpms all the way....no problems.
We have three different props given to us with the boat. Wondering if a prop could be the culprit?? He was thinking that maybe the prop that's currently on the vessel is working too hard, not pulling enough water in? It's not the original prop for the boat.
*also* - when we got back in our slip yesterday he noticed there was a lot of water being pumped out of the bilge and was not sure why or where it was coming from???
Everyone we've talked to is pretty convinced that it's a simple solution...they're just not exactly sure what it is. They're also pretty confident that it's not an "engine" problem because it's not overheating consistently....meaning that it doesn't happen when it hits 2400 rpms.....only after it's "had enough" at that speed. ???
Thanks for any input you may have."