95Nitro Posted December 8, 2012 Report Share Posted December 8, 2012 I have a friend that purchased a boat from a great friend of his for $200.00 (yes 2hundred bucks) it's a 1985 Tidecraft 17'6 w/ 150 Merc The boats been sitting for 6yrs, partially covered with a trarp. Anyways.... we've replaced the floor, rebraced the front deck, and got all the electrical working, and trolingmotor. We replaced the water-pump impeller because his friend through one in that was brand new and still in the package. We hook up the muffs, trurn on the water, just to see if it would even run. Couple quit squirts of starting flood and she hits..... choke it a little more, and after a couple cranks she spits, sputters, smokes, and comes alive. About 3-seconds later she's pissing water pretty good, but wont idle for shyt. So I adjust the idle, and and now she'll purr like a kitten. we took it out for a water test and she'll fire right up (little tough when she's cold) engage the fast idle..... she warms up and runs great at idle. Now..... Here's the issue..... It wont run more than 40% throttle with out dying out, and he has to keep the choke pushed in to get it to do that. .... I think he needs to clean / adjust the carbs (they been sitting for 6yrs with fuel and seafoam in them) and throw in some new plugs. He thinks he's getting air into the fuel.... but my thought is this... the primer bulb stays firm, he replaced the old fuel lines with clear industrial tubing and you can still see fuel in the lines at all times, no air bubbles. Even when it's starting to spit and sputter I've tried to talk him into cleaning the carbs 100x's..... but he still thinks it's fuel related with the lines and the damn primer bulb....... So I'm looking for opinions! Im about ready to kick his azz and take his boat home with me, do the dang carbs myself....... then take it back to him. lol Guess what I am asking is this..... if it's starving for fuel, and wont run over 40% w/o having to have the choke pushed in... it's gotta be carb related..... correct?? Esp since I can see fuel in the lines, and the bulb stays firm? Link to comment Share on other sites More sharing options...
Stratos260 Posted December 8, 2012 Report Share Posted December 8, 2012 I would say it may have some crap in the carb jets. The idle jets may be clean but it may have some stuff stuck in the intermediate and high speed jets. i'm just going on my experience from the last few weeks working on my motor but I'm sure the carbs have some similarities. Link to comment Share on other sites More sharing options...
trackertxw175 Posted December 8, 2012 Report Share Posted December 8, 2012 would also check the diaphragm in the fuel pump if it sat that long. my old tri-hull boat did that even after cleaning carbs and it screamed after i replaced diaphragm. cleaning carbs helped a lot also and replacing primer bulb Link to comment Share on other sites More sharing options...
softbaitmaker Posted December 8, 2012 Report Share Posted December 8, 2012 I'm guessing it is for sure a fuel issue and probably carb related also. Now with that said, motor was built long before the ethanol was put in the fuels. Now your not seeing any water in the clear lines so guess that means there is no water in fuel tank but I would still add a some Blue Marine Sta-bil and some fresh gas to it and see if that helps. It can't hurt. Also might check any fuel filters that may be hid on the motor. I have two in line filters and a water trap filter on my Yamaha right on the motor. I replace it once a year. Just a few ideas you might want to look at..... :thumbsup2: Link to comment Share on other sites More sharing options...
95Nitro Posted December 9, 2012 Author Report Share Posted December 9, 2012 Softy... should have included in the original post... we drained out the old fuel and topped it off with fresh gas, and Stabil Marine Fuel Treatment (Blue/Green) stuff for ethanol. We've replaced the lines, and the primer bulb already.... so all that would be left would be clean and service the carbs, and change out the fuel pump diaphragm.... Just wanted to make sure I wasnt missing anything... I really think he's just being lazy and doesnt want to have to take the (3) Carbs off and clean them. Thanks for the advice fellas! Link to comment Share on other sites More sharing options...
MtCarmelBugMan Posted December 10, 2012 Report Share Posted December 10, 2012 I think you hit the nail on the head with the carbs. I know my dad has a yamaha that sits alot(kicker on a sail boat) and we hav to clean the carbs almost every spring even if you drain all the fuel out for winter. I suspect there are some jets clogged up in this one. I would also replace the fuel pump while I had it apart. They are pretty inexpensive but can cause some major head aches. Link to comment Share on other sites More sharing options...
Mountainman Posted December 10, 2012 Report Share Posted December 10, 2012 Ill bet the carbs are all varnished up. Id start with a thorough cleaning. OMC makes a preety good product called "Engine Tune" in a spray can. Fill carb bowls with it, let it sit over night, drain thru carb bowl and repeat process thru entire can of engine tune. See if this helps before dismantling entire carb. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.