arriva2450
Cadet
- Joined
- Jul 31, 2012
- Messages
- 11
I have a 90 arriva 2450 with a 5.7 magnum and alpha leg. I know it is late in the season but I only got to launch and use it for the first time this season a few days ago.
After running for about 5 minutes I noticed it ran rough and low power and noticed it was overheated. Turned it off and let cool for a few hours. Started it up and now within a minute it starts to exceed 200 (more like 220).
I put in a new impeller last season so doubt that it is. So did some reading a to play with the tstat housing but this is where I'm lost. I have a 6 port housing (2 big hoses and 4 smaller ones; the two smaller ones trhat lead to the exhaust risers have the ball springs). Here are my questions:
1) I believe the big hose on the right (look down on engine from within boat) is the main input. I disconnected this hose and fired up engine for a few seconds. It did have a constant flow but nothing like a garden hose. Is this normal - should I have had a large flow of water. If so I suspect this means my impeller is likely no good. Please confirm.
2) Can someone provide me a brief description of where the other hoses are go (which direction the flow is, where it comes from and where it goes to). I believe the other big hose (on the left) goes to the lower engine, and then the engine pushes the water to the tstat housing where the water then flow out the 4 smaller hoses - 2 go to the manifolds for cooling and the other 2 go to the riser/exhaust. Is this correct?? Oh, what about the hole on the bottom of the housing at connects to the hole on the engine - is this where the tstat opens and closes to allow water into the top of the engine???
3) I removed the 2 bolts holding the tstat housing, and removed the tstat. Being that it is an enclosed unit, I thought to fire up the engine to see if the constant stream of water coming into the housing was making its way around back to the housing so it could feed the other hoses. So I fired it up (while the housing was disconncted from the engine and with the intake hose attached again) and did not see any water flowing? Should I have not seen some water flowing around??? Oh, I did see though that water within the engine was rising (at the hole where the housing attaches to the engine???
4) I notice that when I fire it up (for 5 to 10 seconds) that I see a constant small flow (1mm) leaking somewhere below the manifold on the right side. After engine stopped, this leaking continues for up to another 5 minutes and then eventually stops. Any ideas??? Hopefully this does not suggest a cracked block or something?
Based on the above, I'd appreciate any advice of what my problem might be. Thanks
After running for about 5 minutes I noticed it ran rough and low power and noticed it was overheated. Turned it off and let cool for a few hours. Started it up and now within a minute it starts to exceed 200 (more like 220).
I put in a new impeller last season so doubt that it is. So did some reading a to play with the tstat housing but this is where I'm lost. I have a 6 port housing (2 big hoses and 4 smaller ones; the two smaller ones trhat lead to the exhaust risers have the ball springs). Here are my questions:
1) I believe the big hose on the right (look down on engine from within boat) is the main input. I disconnected this hose and fired up engine for a few seconds. It did have a constant flow but nothing like a garden hose. Is this normal - should I have had a large flow of water. If so I suspect this means my impeller is likely no good. Please confirm.
2) Can someone provide me a brief description of where the other hoses are go (which direction the flow is, where it comes from and where it goes to). I believe the other big hose (on the left) goes to the lower engine, and then the engine pushes the water to the tstat housing where the water then flow out the 4 smaller hoses - 2 go to the manifolds for cooling and the other 2 go to the riser/exhaust. Is this correct?? Oh, what about the hole on the bottom of the housing at connects to the hole on the engine - is this where the tstat opens and closes to allow water into the top of the engine???
3) I removed the 2 bolts holding the tstat housing, and removed the tstat. Being that it is an enclosed unit, I thought to fire up the engine to see if the constant stream of water coming into the housing was making its way around back to the housing so it could feed the other hoses. So I fired it up (while the housing was disconncted from the engine and with the intake hose attached again) and did not see any water flowing? Should I have not seen some water flowing around??? Oh, I did see though that water within the engine was rising (at the hole where the housing attaches to the engine???
4) I notice that when I fire it up (for 5 to 10 seconds) that I see a constant small flow (1mm) leaking somewhere below the manifold on the right side. After engine stopped, this leaking continues for up to another 5 minutes and then eventually stops. Any ideas??? Hopefully this does not suggest a cracked block or something?
Based on the above, I'd appreciate any advice of what my problem might be. Thanks
