Hi. Can you help me out?
I have a Yamaha
~60hp 4 stroke high thrust motor.
~3½years old.
~13½x 15 - K prop., in excellent condition.
~1100 hours exactly...just changed the oils.
~Caribbean , tropical
waterside environment,
~average 6hrs per week, in three trips.
Maybe i noticed because of the added attention after the oil change, I'm not sure. (it has done this a little before) ...but from around 1700 to 2400 rpm, but ONLY in gear, the motor judders. (Forward and reverse. R, only tried it to 1700rpm)
Not a lot, but noticeably, compared to the same rpm in neutral.
The lower unit gear oil was plentiful and clear of milkiness yesterday when i changed it. Nothing on the lower plug's magnet. All foot/engine oil changes have been to the hour, from new.
I'm mystified.
Where i am is pretty remote and there is no worthy mechanic anywhere near....and I'm broke, right now!
Any ideas would be greatfully received. I'm very worried as we live alone looking after wild Amimals.. only indigenous indians close at hand, and the boat is our lifeline. 5 species of deadly viper present, so i try to keep the boat in tip top condition, as the anti venom is 1½hrs away and a Fer de Lance bite gives a window of 3 - 4 hours!!
Thanks a lot.
I have a Yamaha
~60hp 4 stroke high thrust motor.
~3½years old.
~13½x 15 - K prop., in excellent condition.
~1100 hours exactly...just changed the oils.
~Caribbean , tropical
waterside environment,
~average 6hrs per week, in three trips.
Maybe i noticed because of the added attention after the oil change, I'm not sure. (it has done this a little before) ...but from around 1700 to 2400 rpm, but ONLY in gear, the motor judders. (Forward and reverse. R, only tried it to 1700rpm)
Not a lot, but noticeably, compared to the same rpm in neutral.
The lower unit gear oil was plentiful and clear of milkiness yesterday when i changed it. Nothing on the lower plug's magnet. All foot/engine oil changes have been to the hour, from new.
I'm mystified.
Where i am is pretty remote and there is no worthy mechanic anywhere near....and I'm broke, right now!
Any ideas would be greatfully received. I'm very worried as we live alone looking after wild Amimals.. only indigenous indians close at hand, and the boat is our lifeline. 5 species of deadly viper present, so i try to keep the boat in tip top condition, as the anti venom is 1½hrs away and a Fer de Lance bite gives a window of 3 - 4 hours!!
Thanks a lot.