Ok, mystery to me. Water was coming poorly out the telltale and I could idle and run slow but any kind of speed it would overheat and blow steam. Impeller I thought, no biggie. I changed the impeller and housing and grommet seal (all came in kit). I also replaced the head gasket and thermostat, just to be thorough. Put it on muffs at home and the stream was way better and revved it a bit and it stayed cool (didn't rev too much). Went out on the bay crabbing tonight and lo and behold same thing. Although the stream is better out the telltale, once it revs and I do any speed with it same thing, steam and overheat. There's still water at the telltale but it spits and sputters until I rev down, then it cools down. I wasn't out far so it wasn't a big deal to get back in just idling basically but is there anything else I could have missed? The water jackets weren't corroded, the head was clean and all passages seemed clear. The water tube matched up ok when I put the leg back on so I'm at a bit of a loss here...any help appreciated.
Thanks.
Thanks.