Surging and Detonation |
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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I'm thinking about those plugs. I think someone said the protech can't be tested? That sux.
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kvand347
Groupie Joined: September-18-2011 Location: St. Pt. WI Status: Offline Points: 58 |
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I meant shooting cleaner through the barrels while it is running, not dumping some in the tank. So you think I should pull the carb and let it soak overnight? Do you think it is a piece of debris that is getting stuck at WOT? |
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SNobsessed
Grand Poobah Joined: October-21-2007 Location: IA Status: Offline Points: 7102 |
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Running a can through the tank would be a waste of money. Get a gallon & a big bucket to put the carb pcs in overnight.
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“Beer is proof that God loves us and wants us to be happy.”
Ben Franklin |
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kvand347
Groupie Joined: September-18-2011 Location: St. Pt. WI Status: Offline Points: 58 |
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Thought about taking carb cleaner, but didn't remember until after I left for the launch. Any thoughts on using some?
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kvand347
Groupie Joined: September-18-2011 Location: St. Pt. WI Status: Offline Points: 58 |
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I filled up a 5 gal tank. I was out for approximately and hour trying to figure things out. I still have about 2 gal. left in tank, but the hose may have been curled inside the tank. PO said carb was rebuilt approx. 200 hrs ago. Might be a poor job? I haven't owned the boat long enough to even have gone through the original full tank of gas already in the boat. It currently is at 3/4 of a tank. |
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kvand347
Groupie Joined: September-18-2011 Location: St. Pt. WI Status: Offline Points: 58 |
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Here are the videos:
http://www.youtube.com/watch?v=WuxU0dDIzlg http://www.youtube.com/watch?v=YeMODl6uiIs http://www.youtube.com/watch?v=Z-xMPOdLr5U |
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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How much fuel did you have???
What you have ruled out is the antisyphon valve, not a fuel issue yet, if the carb is clogged, it MAY or MAY NOT clear, mostly it wont. So I'd be ordering a rebuild kit. One more question, did you ran the boat with low fuel on the tank after you bought it? Or you always kept it topped? |
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kvand347
Groupie Joined: September-18-2011 Location: St. Pt. WI Status: Offline Points: 58 |
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Bad news guys. Tried the auxiliary tank with premium non-ethanol and the problem's persist. Got her warmed up, eased her into 3/4 throttle, went about 40-50 yards, and motor bogged down and started shaking. Backed off the throttle to idle, tried again, same result. Took some video and will try to post on youtube for all to see. Crazy thing though, the 2nd video I took she ran like a top so I shut off the video. Shortly after, she did it again. Then died and couldn't get her restarted...might just have been the pick up tube in the auxiliary tank not getting anymore gas because I tipped the tank on it's side and she finally started back up and I idled her to the dock.
So, fuel doesn't seem to be the issue. What's next? |
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kvand347
Groupie Joined: September-18-2011 Location: St. Pt. WI Status: Offline Points: 58 |
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Thanks Buffalo and I relayed the info to "the boss"! I will definitely be the addicted kind! I loved working on the c3 corvette and will probably be doing the same with my new toy. I definitely appreciate all the help I can get from you guys. That is why I came here and not to any other forums...you guys are the best! |
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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The issue with the E10 fuel is when you let it sit on the tank for some time, the alcohol sucks the humidity on the ambient and then you have water in. It can be as quick as 2 weeks or sometimes it lasts longer. Depends on many factors.
Decomposed fuel will smell like thinner or solvent. If you use E10 but renew it every 7-15 days you should have no problem using it. So for a quick run you could use it with no problems. Another issue with it is that the alcohol "cleans" the crud and varnishes built up on the tanks and lines and that makes it's way to the engine clogging filters and carbs. In some boats this clean up process takes more time and creates various episodes with the same simptons until it's all clean and all you will have is to drain water from the filter from time to time, if any's in. |
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kvand347
Groupie Joined: September-18-2011 Location: St. Pt. WI Status: Offline Points: 58 |
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It makes me feel good to hear you think it is not a lemon! Would be my most costly mistake to date! FWIW-the PO feels terrible about the situation and wants to know the details of the fix...makes me feel better too. I think there are a couple of gas stations that have the premium blend with no ethanol. I will fill up the spare tank there and see how she runs tomorrow pending no other family obligations. |
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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report back your findings and good luck!.
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kvand347
Groupie Joined: September-18-2011 Location: St. Pt. WI Status: Offline Points: 58 |
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Jim,
The clear plastic tubing is free of any liquid. It must just be the angle of the camera. Installed new fuel/water separator with a NAPA Gold. Unhooked the fuel line to the carb thinking there was another fuel filter inline at the carb, but was suprised to find just a screen. Everything looked great there. The weatherman is calling for sunny and 70 tomorrow so I will try the spare gas tank method and post results pending no other family obligations. |
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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Reassure yourself and your boss that you didn't get a lemon; really. All you have is a few maintence issues to catch up with. The condition of the plugs says they may have been there a while and so forth. Don't be upset...just hang around here a while and we'll get you fixed up. Warning, some have cited addiction issues with this site...and you may just catch yourself doing extra maitenance in the future just 'cause you enjoy it. From here, we'll try to help you eliminate potential problems. |
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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As Eric has pointed, the Protec system shall go only for peace of mind, you should consider it even if you get this issue sorted. The retrofit is around U$D500.
I'd put the separator back on and ran the satellite fuel tank with fresh fuel, go give the engine some gass it might clear the carb. In fact, if running a clean satellite tank, you dont need the water separator in either. also as Jim noted, there should be no fuel on the clear line on the pump to the carb, if so it means the pump is bad and needs change If the boat was running flawless I really doubt it's a lemon, what you are experiencing is what every boat that's left for months with old fuel has since the Ethanol is back at gas pumps. |
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jimsport93
Platinum Member Joined: February-20-2008 Location: Alpharetta Ga Status: Offline Points: 1749 |
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Don,in the fourth pic of the motor. The clear plastic tube running from the fuel pump to the carb. Is there fuel in it? Looks like there may be fuel in that line. Which would indicate a bad fuel pump diaphram.
I have the ProTec on my engine as well....holding my breath every time we go to the lake. So far, so good for now! |
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kvand347
Groupie Joined: September-18-2011 Location: St. Pt. WI Status: Offline Points: 58 |
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Here is what I found with the fuel/water separator. Not sure if anything looks out of place or how to guage how much water is in there, but did notice some sedimentation floating around.
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kvand347
Groupie Joined: September-18-2011 Location: St. Pt. WI Status: Offline Points: 58 |
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Sounds like something to do next season. For now, I'd just like piece of mind that I didn't buy a lemon. |
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eric lavine
Grand Poobah Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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The pro-tec is not a question of will it, its a question of when, many problems with those P/T's, its very possible it is causing the symptoms you are having, you really cant troubleshoot a PT, it may lead you down a different path such as parts replacing. I think if you convert to a regular distributor it will be money well spent, then that will eliminate the doubt.
the crud in the fuel system is very feasible also, the alcohol aka ethenol will loosen all the crud and it gets sucked right into the fuel supply causing restrictions and even blockage. maybe a crap shoot on the Pro-tec, but ive heard no one complain that swapping it over to a conventional distributor, and that it didnt improve performance all around |
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"the things you own will start to own you"
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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That's the choke and I bet you're right about the bumping around on the way home. It's gonna be crud in the fuel system I bet. |
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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Sometimes, they even get rusty if they sit up.
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kvand347
Groupie Joined: September-18-2011 Location: St. Pt. WI Status: Offline Points: 58 |
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History of boat:
I've owned (or should I say my bank has owned ) for 2 weeks. It was purchased from a guy who had it for 2 years. His reason for sale was to use the money for finishing his basement. Since he works nights, he was not able to use the boat as much as he would have liked. He only had it out once this year, 4th of July weekend. The person that owned it before him apparantly had the motor rebuilt. Apparantly his dad is a marine mechanic. There is no documentation whatsoever, but I was disuaded since if its still original it only has 900 hours on her. I have noticed that wires are labeled which leads me to believe that the motor was out at some point. As for the problem: I test drove the boat with him and it seriously ran flawlessly except for a loose alternator belt squeeling on start up which I've since fixed. I had it out last weekend and it ran pretty good. I noticed it bog down on our ride and not want to get up and go, but found the fix to be the negative wire coming loose on the side of the carb (not sure what it is powering). I attached it and off we went! I took it out yesterday since I flushed the tranny and wanted to get the level correct (valvoline dex/merc). It started right away but didn't want to idle at first (I assumed cold weather). Once it started to warm up a little I was able to put the throttle completely in neutral and it idled for about 7 minutes before we took it out. Once tranny level was corrected, I proceeded to do a couple hole shots. First one was good. Second one the motor bogged down and I heard the popping. Brought her down to idle and she was fine. 3rd hole shot was the same as the second, except this time it bogged, surged forward, bogged again, then popping noise. I powered down and took it home. BTW--You can only imagine how my wife feels about all this! |
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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The water separator might have a filter too. At least they do down here.
It can very well be full of crud or full of water. Worth checking it. I'd leave the flame arrestor alone by now. Just not worth the hassle yet. |
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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I use brake parts cleaner and spray from the inside out and follow up with air. That's not your issue now though. For those with the smaller diameter brass arrestor; they fit nicely in a coffee can. |
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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What's the history of the boat? You've had it how long?
Yes, that's the seperator. That could well be your issue if it's not been serviced in a while. They can get nasty and pass junk along to the carb. Carb's hate that. |
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kvand347
Groupie Joined: September-18-2011 Location: St. Pt. WI Status: Offline Points: 58 |
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I took the bolt off with the PCM plastic shroud so it would expose the carb. How do you clean the flame arrestor? Manual says use solvant. What kind?
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kvand347
Groupie Joined: September-18-2011 Location: St. Pt. WI Status: Offline Points: 58 |
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Luchog,
I'm pretty sure water separator is the black canister under the orange holder on the second to last engine picture. Fuel filter is a bit more tricky for me. On my vette it was an inline filter right where the fuel line meets the carb. Is this true for the holley carb? Thanks for the advice on the satellite fuel tank, I will try that hopefully later today if I can get some clear weather! FWIW--the boat did travel 3 hours after I bought it and it may have jostled some junk loose in the tank. |
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BuffaloBFN
Grand Poobah Joined: June-24-2007 Location: Gainesville,GA Status: Offline Points: 6094 |
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Flame arrestor bolt. |
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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The detonation you're saying are pops through the carb, which could be caused by a missdetonation (ignition) or a mixture condition (carb)
I believe this is a fuel issue. I'd try running it with a satellite fuel tank after draining the fuel filter/water separator. If it solves you'll need to drain and clean the fuel tank, check the antisyphon valve at the pick up for cloggage too, or just take it out. If it doesnt solves the issue It could be a clogged jet at the carb. Will need to take it apart for cleaning. Then after you have it running good, swap for some Autolites plugs. |
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kvand347
Groupie Joined: September-18-2011 Location: St. Pt. WI Status: Offline Points: 58 |
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Buffalo,
I don't think the valve cover is leaking. The residue you noticed seemed to be leaking out the bottom of the spark plugs. Could it mean they weren't on tight enough? I know they are supposed to be torqued to only 15ft/lbs. I did NOT notice any of the port plugs come off any easier suggesting that they were loose. |
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