Rotax 503 CHT to cool.
in 2 Stroke Technical Questions
14 years ago
Hi guys the new forum looks like it maybe very useful,
Something I am not to sure about.....I have a 503 dcdi with about 20hrs on the clock...yes its new out of the box,
Anyway its seems to run cool CHT wise, with both cylinders at around 150c/300f, the book fig is 180c/360f to 220c/430f,
What do you think and what does yours run at,
The 503 is on a trike and at cruise the RPM is aprox 4900/5000,
The EGTs are ok at aprox 600c/1115f...although I did raise the needles one notch from factory settings when I fitted the motor as the EGT was at max...but it was a cold time of year +4c/40f, but as the OAT is higher now it maybe worth dropping them back down,
Its bothers me that with it being a bit on the cool side it may make the motor tight and more prone to seizing....What do you think guys.
Nick.
Something I am not to sure about.....I have a 503 dcdi with about 20hrs on the clock...yes its new out of the box,
Anyway its seems to run cool CHT wise, with both cylinders at around 150c/300f, the book fig is 180c/360f to 220c/430f,
What do you think and what does yours run at,
The 503 is on a trike and at cruise the RPM is aprox 4900/5000,
The EGTs are ok at aprox 600c/1115f...although I did raise the needles one notch from factory settings when I fitted the motor as the EGT was at max...but it was a cold time of year +4c/40f, but as the OAT is higher now it maybe worth dropping them back down,
Its bothers me that with it being a bit on the cool side it may make the motor tight and more prone to seizing....What do you think guys.
Nick.
