Ok guys, I'm fairly new to boats, but not engines (I'm a semi tech), but I'm having some issues I can't see to figure out on my boat. I just picked it up the last weekend and am having issues. Hope I can get some help!
A little back story, got the boat for labor day weekend, got it in the water and everything was great! Ran around the lake for a few hours both slow and opened up. At full throttle under a load Of only get about 4k rpms off of it, but didn't think anything about it. The boat ran flawlessly. Next day on my way out to the lake from the dock I caught a rope in the prop. Saw the temp gauge moving up fast and shut it down. At first I thought it was just sea grass until I grabbed a rope.. got everything cleared and limped back to the dock. Engine was about 200ish degrees. Let it cool for the night and checked the next morning. Started to heat up really fast. So shut it off again. Later in the day I started it while cold and revved it to about 2200rpms and saw a LOT of air coming out the back. Waited til there was no air an put it back to an idle and since then I haven't had an issue with temperature. It never gets close to 160 degrees.. Hovers around 140ish.
Now, I took the boat to a cleaner/bigger lake on Monday and ran around the lake at about 1800rpms for about 30 mi Utes before trying to open her up (mainly making sure she wasn't going to overheat). Everything looked great and felt fine, so I opened her up. She runs great for about 30 seconds and dies. Starts right back up. After messing with it for another 30 minutes I find anything over 2200rpms under a load and it's just like you turn off the ignition. Sputters, falls flat on its face and just sounds like it's bogging down. I take the boat home and do a full tune up on it. Out of the water it runs great (I have muffs, just putting that out so nobody thinks I dry ran it). I thought at first it was bad fuel, but new fuel (drained tank of old fuel), added seafoam, and the tune up and it runs pretty good til about 1800rpms.. At this point I can hear it missing a little bit and it's smoking pretty bad (blue smoke). But again, temps are only around 130-140 degrees and even touching the coolant hoses they aren't too hot.
So my question is, is it possible to have my valve seals leaking bad enough to blow oil out of it? Oil is on the inside of my prop where the jam nut/castle nut is that hold it on. I also blew oil in the grass from the exhaust too.. It's black and slimy. Second question I have, when revving it up and letting it come back down and re-revving it to put a load on it, it bogs out for a few split seconds then catches itself. I'm not 100% familiar with carbs so please forgive my ignorance here, but with the throttle disconnected and the boat off, when I start giving it gas, I see a stream of gas in each intake port of the carb, is that right/good? I'd really like to get this figured out before I have to winterize it as there are still good days to be on the water!
Thanks in advance for the help!
A little back story, got the boat for labor day weekend, got it in the water and everything was great! Ran around the lake for a few hours both slow and opened up. At full throttle under a load Of only get about 4k rpms off of it, but didn't think anything about it. The boat ran flawlessly. Next day on my way out to the lake from the dock I caught a rope in the prop. Saw the temp gauge moving up fast and shut it down. At first I thought it was just sea grass until I grabbed a rope.. got everything cleared and limped back to the dock. Engine was about 200ish degrees. Let it cool for the night and checked the next morning. Started to heat up really fast. So shut it off again. Later in the day I started it while cold and revved it to about 2200rpms and saw a LOT of air coming out the back. Waited til there was no air an put it back to an idle and since then I haven't had an issue with temperature. It never gets close to 160 degrees.. Hovers around 140ish.
Now, I took the boat to a cleaner/bigger lake on Monday and ran around the lake at about 1800rpms for about 30 mi Utes before trying to open her up (mainly making sure she wasn't going to overheat). Everything looked great and felt fine, so I opened her up. She runs great for about 30 seconds and dies. Starts right back up. After messing with it for another 30 minutes I find anything over 2200rpms under a load and it's just like you turn off the ignition. Sputters, falls flat on its face and just sounds like it's bogging down. I take the boat home and do a full tune up on it. Out of the water it runs great (I have muffs, just putting that out so nobody thinks I dry ran it). I thought at first it was bad fuel, but new fuel (drained tank of old fuel), added seafoam, and the tune up and it runs pretty good til about 1800rpms.. At this point I can hear it missing a little bit and it's smoking pretty bad (blue smoke). But again, temps are only around 130-140 degrees and even touching the coolant hoses they aren't too hot.
So my question is, is it possible to have my valve seals leaking bad enough to blow oil out of it? Oil is on the inside of my prop where the jam nut/castle nut is that hold it on. I also blew oil in the grass from the exhaust too.. It's black and slimy. Second question I have, when revving it up and letting it come back down and re-revving it to put a load on it, it bogs out for a few split seconds then catches itself. I'm not 100% familiar with carbs so please forgive my ignorance here, but with the throttle disconnected and the boat off, when I start giving it gas, I see a stream of gas in each intake port of the carb, is that right/good? I'd really like to get this figured out before I have to winterize it as there are still good days to be on the water!
Thanks in advance for the help!
