What causes excessive carbon chips coming out of the exhaust through the prop on a Yamaha HPDI 225? There seems to be quite a lot when I load the boat onto the trailer and trim motor down the drain the water out of the lower unit.
What causes excessive carbon chips coming out of the exhaust through the prop on a Yamaha HPDI 225? There seems to be quite a lot when I load the boat onto the trailer and trim motor down the drain the water out of the lower unit.