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New to the forum so please excuse my ignorance. I own twin t60 4strokes, both purchased brand new with my boat in 2009. They have had regular maintenance every 100 hours with fuel/water separator filters changed every 500 hrs.
On my last fishing trip, I experienced the alarm coming on when I went from *****ing speed up to cruising speed (approx. 4000 to 4500 rpm). This did not happen every time I increased speed. Sometimes I was able to go full throttle and then after a bit, the alarm would come on again I think only on the port side engine. I would slow down, bringing both engines to idle, turn off the engine to stop the alarm, then restart both engines. Then I would increase to cruising speed and the engine might be fine for 10 minutes, then the alarm would sound again. I reasoned that if I could keep the nose up and the gas back in the tank, I could avoid the dirty gas and the alarm coming on, but if a wave caused my nose to come down, then the gas would slosh and the alarm would sound, the engine would sputter, and I would have to go through the process again. This seemed like it was making perfect sense, and I actually did cruise the last 5 miles straight in, keeping my nose up and had no further problems. Therefor, I really felt that the fuel was the problem.
Thinking it was dirty fuel because I only have a 45 gal. tank and on long boat trips, I can get to the bottom of the tank, I changed my fuel/water filters again (it was time) and went on another fishing trip. This time, after *****ing for an hour at approx. 2900 rpm, and the engines running perfectly, I opened it up to cruising speed and once again, the port side alarm came on at 4000 rpm. The engine would sputter like it was starved for gas and I would bring it down to idle and everything was fine. I had to turn off the key to shut off the alarm, restart the engine but could only do *****ing speed. I had fresh high quality fuel in the boat with new fuel/water separator filters, so fuel was not the issue. I attempted cruising speed again, and once again, the alarm came on at around 4000 rpm. Not wanting to cause any damage, I stayed in *****ing speed all day until getting home.
I initially thought perhaps I had a fuel injector problem, but after reading other posts, realize that it might be the water pump sensor. Can someone advise the proper steps to take to diagnose and correct my problems? Could it be a fuel injector that has a clog which only acts up at high rpm? I am clueless.
On my last fishing trip, I experienced the alarm coming on when I went from *****ing speed up to cruising speed (approx. 4000 to 4500 rpm). This did not happen every time I increased speed. Sometimes I was able to go full throttle and then after a bit, the alarm would come on again I think only on the port side engine. I would slow down, bringing both engines to idle, turn off the engine to stop the alarm, then restart both engines. Then I would increase to cruising speed and the engine might be fine for 10 minutes, then the alarm would sound again. I reasoned that if I could keep the nose up and the gas back in the tank, I could avoid the dirty gas and the alarm coming on, but if a wave caused my nose to come down, then the gas would slosh and the alarm would sound, the engine would sputter, and I would have to go through the process again. This seemed like it was making perfect sense, and I actually did cruise the last 5 miles straight in, keeping my nose up and had no further problems. Therefor, I really felt that the fuel was the problem.
Thinking it was dirty fuel because I only have a 45 gal. tank and on long boat trips, I can get to the bottom of the tank, I changed my fuel/water filters again (it was time) and went on another fishing trip. This time, after *****ing for an hour at approx. 2900 rpm, and the engines running perfectly, I opened it up to cruising speed and once again, the port side alarm came on at 4000 rpm. The engine would sputter like it was starved for gas and I would bring it down to idle and everything was fine. I had to turn off the key to shut off the alarm, restart the engine but could only do *****ing speed. I had fresh high quality fuel in the boat with new fuel/water separator filters, so fuel was not the issue. I attempted cruising speed again, and once again, the alarm came on at around 4000 rpm. Not wanting to cause any damage, I stayed in *****ing speed all day until getting home.
I initially thought perhaps I had a fuel injector problem, but after reading other posts, realize that it might be the water pump sensor. Can someone advise the proper steps to take to diagnose and correct my problems? Could it be a fuel injector that has a clog which only acts up at high rpm? I am clueless.
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