Hoping for some direction as Ive exhausted most of my ideas, and we are supposed to be going on a family trip to the keys in a
few days with my boat....
I'll try to keep it short and to the point:
Motors has ran flawlessly for a few years.
This year she sat much longer then ever before, maybe took two trips in 6 months on her.
On the last one she threw a solid alarm and the engine stopped...
I have now changed both TStats and the sensors next to them.
gaskets on the TStat and the gasket on the poppet valve cover (it was dried and shrunken), the valve seemed fine so didnt replace it.
new impeller installed
I bought two gallons ($150!!!) of barnacle buster and ran it through the TStats down , then ran the engine in a tub with the same stuff for a few minutes
Ive done multiple test runs and the results are usually the same
I can idle for 20min no problem, I can run her at 20-25mph (~4000rpm) for 30min with no issues.
but if I push her close to 30mph (around 5K) she lasts about 5-10min then throws a solid alarm and the engine completely shuts off.
Usually I wait a few minutes (3-5min) and she always starts right back up and drives fine just like above.
when the alarm goes off, I laser temped the top of the engine next to each sensor, on average the port is 165ish and the starboard side is 180ish
this has been repeated 4 times this past weekend, always the same result
When it happens its a solid alarm and the engine just stops
I tried shorting the diag connector to send the code to the key switch light, but saw no codes show up (pretty sure I did it right.)
One thing that is confusing me is the orientation of the poppet valve, mine was upside down compared to the schematic, which is confusing since its been that way for 4 years now so likely not the issue???
Sorry for the length, but wanted to give the whole story and details of whats been tried and the results.
Really bummed as we are going to the keys this saturday.
thanks for any help
Danny
few days with my boat....
I'll try to keep it short and to the point:
Motors has ran flawlessly for a few years.
This year she sat much longer then ever before, maybe took two trips in 6 months on her.
On the last one she threw a solid alarm and the engine stopped...
I have now changed both TStats and the sensors next to them.
gaskets on the TStat and the gasket on the poppet valve cover (it was dried and shrunken), the valve seemed fine so didnt replace it.
new impeller installed
I bought two gallons ($150!!!) of barnacle buster and ran it through the TStats down , then ran the engine in a tub with the same stuff for a few minutes
Ive done multiple test runs and the results are usually the same
I can idle for 20min no problem, I can run her at 20-25mph (~4000rpm) for 30min with no issues.
but if I push her close to 30mph (around 5K) she lasts about 5-10min then throws a solid alarm and the engine completely shuts off.
Usually I wait a few minutes (3-5min) and she always starts right back up and drives fine just like above.
when the alarm goes off, I laser temped the top of the engine next to each sensor, on average the port is 165ish and the starboard side is 180ish
this has been repeated 4 times this past weekend, always the same result
When it happens its a solid alarm and the engine just stops
I tried shorting the diag connector to send the code to the key switch light, but saw no codes show up (pretty sure I did it right.)
One thing that is confusing me is the orientation of the poppet valve, mine was upside down compared to the schematic, which is confusing since its been that way for 4 years now so likely not the issue???
Sorry for the length, but wanted to give the whole story and details of whats been tried and the results.
Really bummed as we are going to the keys this saturday.
thanks for any help
Danny
