old guy with kids boat
New Member
Hey guys, I'm kind of stumped. 787 rev right up to 5000 hangs there for maybe 45 secs then slowly planes out. After another 5 or 10 secs it jumps to 6500 -7000 rpm have to hold it at about 3/4 throttle to get it to do this. Acts like Rave valves sticking but they are new this year and cleaned them anyway. Rave bellows replaced last year. water Rave rebuilt last year. If I pull choke it bogs the engine. Also it will repeat this over say 20 mins on water never jumping to 6500 rpm always have to feather it up. Then after the 20 min or so period it will just hang at 4800 rpm and can never get back up to 6500 again until later in day. throttle cable adjusted, low speed jets 1 turn out high speed jets at 0 acceleration pump adjusted to spec. oil pump adjusted to spec. Carbs rebuilt last spring and only have about 5 hrs on them. idles fine at 1500 rpm.