"I've just dropped a new 3
"I've just dropped a new 351 into my boat and I've been breaking it in. Cold, it runs great, plenty of power, no hesitation. When it warms (20-30 mins in) and I stop and idle for a couple of minutes, it then starts to act up. At first, I can use only about 1/4 throttle - as soon as I go past that, it cuts out, back-fires and acts like it is getting no gas. If I power down and continue to run it, it eventually gets to the point where I can't even throttle up. I turn it off and try to restart and it acts like it is starving. If I let it sit for 5 or 10 mins, it will then start (at least) and I can putt back in. I've let it sit for longer (20 mins) and gone back out and it seemed ok again... for about 10 mins, then starts acting up again.
Just about everything is new, except for the carb (which is relatively new - replaced about 6 mos prior to the new engine). It has been suggested that it is timing, but why then would it not be off consistently.
Any ideas or suggestions as what to try? I'm going to pull the carb today and clean it. I've put in new a fuel filter and water separator. In fact, just about EVERYTHING has been replaced... so, I'm at a loss."
"I've just dropped a new 351 into my boat and I've been breaking it in. Cold, it runs great, plenty of power, no hesitation. When it warms (20-30 mins in) and I stop and idle for a couple of minutes, it then starts to act up. At first, I can use only about 1/4 throttle - as soon as I go past that, it cuts out, back-fires and acts like it is getting no gas. If I power down and continue to run it, it eventually gets to the point where I can't even throttle up. I turn it off and try to restart and it acts like it is starving. If I let it sit for 5 or 10 mins, it will then start (at least) and I can putt back in. I've let it sit for longer (20 mins) and gone back out and it seemed ok again... for about 10 mins, then starts acting up again.
Just about everything is new, except for the carb (which is relatively new - replaced about 6 mos prior to the new engine). It has been suggested that it is timing, but why then would it not be off consistently.
Any ideas or suggestions as what to try? I'm going to pull the carb today and clean it. I've put in new a fuel filter and water separator. In fact, just about EVERYTHING has been replaced... so, I'm at a loss."