kolnerspieler
Cadet
- Joined
- Mar 16, 2010
- Messages
- 14
I just repowered my 1990 Cruisers Holiday 2570 with a vortec mercruiser 350. The only problem that I have at this point is that it is not holding temperature when I try to get the boat on plane. Here are some details about the engine and the issue.
The sender unit I pulled from old engine so it is the correct sender unit. I am assuming that the temperature gauge is showing the correct reading.
The manifolds and risers are used, but appeared to be in very good condition not showing any scaling. I will probably pull these and replace them just to rule out this possibility.
The impeller in the outdrive is also bran new including gasket and housing.
When I drive the boat just cruising at 1500 rpm the temperature is holding where it needs to be. When it is idling it goes to maybe about 180F or so. So at idle it goes up slightly but holds steady there. Now when I try to accelerate and get the boat on plane it quickly jumps to 195 and stays there while on plane. As soon as I get off plane and back to slow cruising around 1400 or 1500 rpm the temp goes back down to normal. Seems like a flow issue, but not sure where it would be coming from. The engine is a 2008 that was in storage for 4 years and now has about 30 hours on it. I am assuming that the circulating pump is ok, the hose coming from the circulating pump to the T stat housing is usually very hot and I can pinch the hose with my fingers. I am not sure if I should be able to do this or now.
The T balls are also new and are tight. I am not sure where to look. The T stat is also brand new. My only thoughts are that it could be the circulating pump or a restriction of flow throught the manifolds and risers, but based on the condition that I saw I would say that it is unlikely. Another interesting thing that I notice is that my risers are sometimes hot and not always the same riser. Sometimes it is the port side riser and sometimes the starboard riser. Not sure why this would be.
If you guys have any input I would appreciate it.
The sender unit I pulled from old engine so it is the correct sender unit. I am assuming that the temperature gauge is showing the correct reading.
The manifolds and risers are used, but appeared to be in very good condition not showing any scaling. I will probably pull these and replace them just to rule out this possibility.
The impeller in the outdrive is also bran new including gasket and housing.
When I drive the boat just cruising at 1500 rpm the temperature is holding where it needs to be. When it is idling it goes to maybe about 180F or so. So at idle it goes up slightly but holds steady there. Now when I try to accelerate and get the boat on plane it quickly jumps to 195 and stays there while on plane. As soon as I get off plane and back to slow cruising around 1400 or 1500 rpm the temp goes back down to normal. Seems like a flow issue, but not sure where it would be coming from. The engine is a 2008 that was in storage for 4 years and now has about 30 hours on it. I am assuming that the circulating pump is ok, the hose coming from the circulating pump to the T stat housing is usually very hot and I can pinch the hose with my fingers. I am not sure if I should be able to do this or now.
The T balls are also new and are tight. I am not sure where to look. The T stat is also brand new. My only thoughts are that it could be the circulating pump or a restriction of flow throught the manifolds and risers, but based on the condition that I saw I would say that it is unlikely. Another interesting thing that I notice is that my risers are sometimes hot and not always the same riser. Sometimes it is the port side riser and sometimes the starboard riser. Not sure why this would be.
If you guys have any input I would appreciate it.
