Home › Forum › Ask A Member › Cold Running Motor…Revisited › Re: Cold Running Motor…Revisited
OK, let me say right off, I have no experience with running motors in 44 degree water (here in FL). Having said that, I wonder if maybe mumbles got it. Check that restrictor.
If that isn’t the problem, I wonder if the problem really is abnormal. I mean, a lot of water goes through that powerhead even with the thermostat closed. Maybe you are expecting it to get warmer than it can?? I think it should run fine at 80 degrees anyway. Might have to enrich the idle needle a tad till summer arrives. And try to get that spark/carb sync as close as you can.
Are you aware of the problem the 25 has with the drain valve dumping into the upper cylinder, making it richer than the lower one? That makes adjusting the idle mixture difficult (I say almost impossible to get it right). That is a problem built into the motor. I used to do my possibly illegal modification on them.