M
Monoki
Guest
"Help!
I have twin 1992 Yam
"Help!
I have twin 1992 Yamaha 200HP 2-stroke counter rotating engines on a 1992 25' Grady-White. A 30-second steady sensor goes off at roughly 4300 RPM. As a result BOTH engines are dropped to ~2000 RPM for safety. I cannot identify the problem.
Short history....
(1) I don't think it's oil. Oil filters and pumps on both the integral and reserve tanks appear to be working fine. In fact I swapped between the two engines and still have the same alarm. The visual oil sensors I believe are also working as they should.
(2) I have replaced the fuel filters with 8 microns. Still same 30-seond steady sensor goes off at ~4300 RPM.
(3) I don't think it's an overheat sensor because the sensor will pop on within 20 seconds of 4300-plus RPM.
(4) It might be water pressure, although the spout appears to be very strong and nearly identical to the portside engine. I've used to Salt Away and still have same problem with the sensor.
(5) To note, and questions that I cannot answer. The problem engine has the anticavitation plate chipped on side with a small section missing. Also, I have a small transom-fixed tranducer mounted closer to the problem engine than the other. I'm only guessing that at higher RPMs too much air is going through, but even totally trimmed in, I still have the sensor go off.
Early this season, I could run at WOT and a nice 4400-4600 cruise. The first time the sensor went off was at roughly 4600 RPM and has steadily decrease to 4300 RPM.
Question: what scenario(s) trip off that 30-second steady audible sensor? Is it a specific warning or a general warning that might be the result of one of more culprits. How do I trouble shoot this?
Semper fidelis,
Chris Monoki"
I have twin 1992 Yam
"Help!
I have twin 1992 Yamaha 200HP 2-stroke counter rotating engines on a 1992 25' Grady-White. A 30-second steady sensor goes off at roughly 4300 RPM. As a result BOTH engines are dropped to ~2000 RPM for safety. I cannot identify the problem.
Short history....
(1) I don't think it's oil. Oil filters and pumps on both the integral and reserve tanks appear to be working fine. In fact I swapped between the two engines and still have the same alarm. The visual oil sensors I believe are also working as they should.
(2) I have replaced the fuel filters with 8 microns. Still same 30-seond steady sensor goes off at ~4300 RPM.
(3) I don't think it's an overheat sensor because the sensor will pop on within 20 seconds of 4300-plus RPM.
(4) It might be water pressure, although the spout appears to be very strong and nearly identical to the portside engine. I've used to Salt Away and still have same problem with the sensor.
(5) To note, and questions that I cannot answer. The problem engine has the anticavitation plate chipped on side with a small section missing. Also, I have a small transom-fixed tranducer mounted closer to the problem engine than the other. I'm only guessing that at higher RPMs too much air is going through, but even totally trimmed in, I still have the sensor go off.
Early this season, I could run at WOT and a nice 4400-4600 cruise. The first time the sensor went off was at roughly 4600 RPM and has steadily decrease to 4300 RPM.
Question: what scenario(s) trip off that 30-second steady audible sensor? Is it a specific warning or a general warning that might be the result of one of more culprits. How do I trouble shoot this?
Semper fidelis,
Chris Monoki"