My 1989 Yamaha 70HP ETLF just started bogging down momentarily at low rpm. When I enter a "no wake" section and back of the throttle/power it is fine for about a 100 yards (a few minutes) then it just sounds like it gets no gas, it doesn't misfire or have any other obvious motor issue when it happens. If I back off the throttle to neutral and give it a slight rev, then return to forward I can go right back to the same rpm/speed for another few minutes before it happens again and again.
Things you should know:
1- it is inconsistent in the time it takes to act like this, could be a minute sometimes and 5 minutes another time.
2- i worked on it this week, cooling system had a gunk clog that i flushed out.
3- when working on the cooling system i found it DOES NOT have a thermostat in it. i have a brand new thermostat to put in, but do I need it? I have had the boat for 6 months and it has run fine without it. However, is it running cold? Thoughts here?
4- when wake boarding it now "appears" to be a bit sluggish for just a moment when i "hit it" to start and pull the kids out of the water, almost like it waits to build up some rpm, this was not the case a few weeks ago when it just jumped out.
5- at high rpm everything seems to be fine.
6- it's so old and was so cheap no gauges or alarms work at all...
You may be able to hear the symptom here if you turn your volume up:
http://www.youtube.com/watch?v=fcjPutCqxvk
Things you should know:
1- it is inconsistent in the time it takes to act like this, could be a minute sometimes and 5 minutes another time.
2- i worked on it this week, cooling system had a gunk clog that i flushed out.
3- when working on the cooling system i found it DOES NOT have a thermostat in it. i have a brand new thermostat to put in, but do I need it? I have had the boat for 6 months and it has run fine without it. However, is it running cold? Thoughts here?
4- when wake boarding it now "appears" to be a bit sluggish for just a moment when i "hit it" to start and pull the kids out of the water, almost like it waits to build up some rpm, this was not the case a few weeks ago when it just jumped out.
5- at high rpm everything seems to be fine.
6- it's so old and was so cheap no gauges or alarms work at all...
You may be able to hear the symptom here if you turn your volume up:
http://www.youtube.com/watch?v=fcjPutCqxvk