Angla
18-08-2005, 08:01 AM
Has anyone else had any problems with fumes from their motor.
I have a half cabin and the 135 Optimax has been great from when it was new 18 months ago and then about 2 months ago started getting fume smells while cruising. Speed did not change the odours at all.
I figured I would wait until the 100 hour service and they could find the problem. No clues there but they did say the plugs were fairly dirty. Asked me what fuel and I said always BP Ultimate 98 octane. Oil was always only Mercury optimax oil so no point looking at this.
They checked the manual and said only 87 octane was recommended. So added 80 litres of unleaded 92 to the 80 litres left in the tank and now the fumes seem to be gone. Figure on only using normal unleaded from now on.
Funny how I did not have a problem for so long until now. Maybe there is a new additive in the fuel. Anyway it seems I have just wasted good money for nothing on the more expensive fuel.
It seems just a good thing to have done for the performance of the motor but really was bad it seems.
Performance has not appeared to have changed and I do and have always found good economy from the motor, around 1 litre or a little less for 1 knott (Generally 19-21 litres per hour for 21-23 knotts, 26-27 for 26 knotts, 41 for 38 knotts full speed)
Angla
I have a half cabin and the 135 Optimax has been great from when it was new 18 months ago and then about 2 months ago started getting fume smells while cruising. Speed did not change the odours at all.
I figured I would wait until the 100 hour service and they could find the problem. No clues there but they did say the plugs were fairly dirty. Asked me what fuel and I said always BP Ultimate 98 octane. Oil was always only Mercury optimax oil so no point looking at this.
They checked the manual and said only 87 octane was recommended. So added 80 litres of unleaded 92 to the 80 litres left in the tank and now the fumes seem to be gone. Figure on only using normal unleaded from now on.
Funny how I did not have a problem for so long until now. Maybe there is a new additive in the fuel. Anyway it seems I have just wasted good money for nothing on the more expensive fuel.
It seems just a good thing to have done for the performance of the motor but really was bad it seems.
Performance has not appeared to have changed and I do and have always found good economy from the motor, around 1 litre or a little less for 1 knott (Generally 19-21 litres per hour for 21-23 knotts, 26-27 for 26 knotts, 41 for 38 knotts full speed)
Angla