Alan Hicks
Advanced Contributor
New here, just joined, but have been a frequent lurker.
I bought this engine on the cheap from a guy in the Tampa area, knowing full well it hadn't been well taken care of - what I call a "salty". I've had the head and the exhaust cover off, and removed all the crud. New water pump and t-stat. All passageways have been cleared of crud using a coat hanger and compressed air. Peeing like a champ. This is not the first one of these 40/50's I've done, but it is my first EFI.
Long story, multiple issues, but I believe my immediate problem has to do with the second water temp sensor, the one located by the oil filter (I suspect this is more of a block temp sensor?) After a LOT of messing around, I figure something is going on here. With the engine on muffs, and with plenty of water available, I'm getting an alarm from the control head (which is an old style, and works fine with other older motors) when the engine is run at 2k for a few minutes. It will idle forever.
The 2 temp sensors are identical, have the same part number. I've swapped them to see if the problem remains and it does. However, if I remove the second sensor from the block and let it hang by the wires, there is no alarm. It would seem the block is getting hot enough to cause the sensor to set off the alarm?
The water temp coming from the indicator/pisser does not seem that hot. You can leave it running on your hand. I get no sense that the engine is hot.
Oil and filter are fresh.
Ideas?
Sorry to wander, but I wanted to include as much detail so as not to leave you wondering what's been done.
Thanks so much!
I bought this engine on the cheap from a guy in the Tampa area, knowing full well it hadn't been well taken care of - what I call a "salty". I've had the head and the exhaust cover off, and removed all the crud. New water pump and t-stat. All passageways have been cleared of crud using a coat hanger and compressed air. Peeing like a champ. This is not the first one of these 40/50's I've done, but it is my first EFI.
Long story, multiple issues, but I believe my immediate problem has to do with the second water temp sensor, the one located by the oil filter (I suspect this is more of a block temp sensor?) After a LOT of messing around, I figure something is going on here. With the engine on muffs, and with plenty of water available, I'm getting an alarm from the control head (which is an old style, and works fine with other older motors) when the engine is run at 2k for a few minutes. It will idle forever.
The 2 temp sensors are identical, have the same part number. I've swapped them to see if the problem remains and it does. However, if I remove the second sensor from the block and let it hang by the wires, there is no alarm. It would seem the block is getting hot enough to cause the sensor to set off the alarm?
The water temp coming from the indicator/pisser does not seem that hot. You can leave it running on your hand. I get no sense that the engine is hot.
Oil and filter are fresh.
Ideas?
Sorry to wander, but I wanted to include as much detail so as not to leave you wondering what's been done.
Thanks so much!