Do I need new exhaust manifolds? |
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inglesideshawn
Senior Member Joined: April-03-2009 Location: ingleside, il Status: Offline Points: 203 |
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sounds like a fue problem..
try the pick up tube in the tank,(broken) siphon valve? or just run it out of a outboard tank and eliminate the fuel system and see if that works.. |
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1989 nautique
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QUEBEC
Senior Member Joined: August-30-2009 Location: NEW JERSEY Status: Offline Points: 216 |
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I think you have fuel a delivery problem here. if you can I would instll a guage on the pickup side of the fuel pump. between pump and filter on the tank side that can read a vacuum like on a old oil burner or fuel pump. then take ride around the lake and monitor the reading. there should be no vacuum reading at all if there is you have a restiction. dirt or somthing in the tank/ bad fuel line filter or fittings somthing on the fuel pickup side of the system.
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NEVER EVER GIVE UP ON YOUR SELF YOUR FAMILY YOUR FRIENDS AND GOD THERE ALWAYS A NEW DAY
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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The gauge is not a bad idea but it's more common to put a pressure gauge between the pump and the carb. You should see around 6 to 7 lbs.
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QUEBEC
Senior Member Joined: August-30-2009 Location: NEW JERSEY Status: Offline Points: 216 |
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A guage that reads a vacuum on the pick up side is a quick way to monitor any type of system with fluids that are pulled from a tank for a small or large restriction. once the guage comes of 0 there is a problem starting. A pressure guage will not respond that fast to any problems.
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NEVER EVER GIVE UP ON YOUR SELF YOUR FAMILY YOUR FRIENDS AND GOD THERE ALWAYS A NEW DAY
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horkn
Platinum Member Joined: September-10-2007 Location: Cedarburg, Wi Status: Offline Points: 1511 |
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So on the stock front fuel bowl, what is the thread for the inlet? it's definitely not 9/16-24 like the side mount one on the carb I linked to.
I am trying to find a new fuel line to bolt to my carb and put that in line fuel pressure gauge(0-15 psi liquid filled). I do need a new choke assembly as well as my electrical prong broke on my old one last summer, so I am getting a parts order from summit to get what I need. Unless someone has a used but good electric choke Assembly for sale.... |
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78 martinique- refloored, reinforced, stringers re glassed, re engineered interior
GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |
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kapla
Grand Poobah Joined: March-27-2008 Location: BA, Argentina Status: Offline Points: 6148 |
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this is my Pressure guage installation I did 2 weeks ago...
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<a href="">1992 ski nautique
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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so you've been running the boat with full choke and wonder why it's not getting any RPM's |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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It should be a SAE flare.
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JoeinNY
Grand Poobah Joined: October-19-2005 Location: United States Status: Offline Points: 5697 |
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Sounds like the problem to me.. |
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81nautique
Grand Poobah Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5775 |
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I knocked a choke wire off my 81 last fall while winterizing and didn't notice it, within a few minutes it started missing like hell and pouring black smoke out the back. I do run colder plugs in my boat than most do though so it doesn't take much to screw it up. I really hope this isn't the choke or Mr Horkin's gonna have some egg on his face for sure. |
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You can’t change the wind but you can adjust your sails
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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all it takes is leaving out one little piece of information to get side tracked and start chasing a tail.
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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now are we sure the choke got stuck closed?
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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the normal postion is closed and since the terminal is broken there is no reason to feel that the coil inside of it is broken allowing the choke to open. Also if it was stuck open then starting would be a major pain. |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Tom,
Do you understand how the electric choke works? We can fill you in if needed!! |
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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I have my choke disconnected and the plate's wide open. it just takes a little throttle at cold starts to have her going, no pain involved, and engines rans great once it's warm. Now, if the plate's stuck closed it would start nicely and ran like crap after warm up, wouldnt it? |
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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you can adjust the choke so it is that way if you don't want to use it. but typically when it is installed correctly there is tenson on the top butterfly and has the coil heats up it opens the choke
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horkn
Platinum Member Joined: September-10-2007 Location: Cedarburg, Wi Status: Offline Points: 1511 |
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LOL. no this piece got knocked off the choke after futzing with the carb 1000 times. It has no effect on the running of the motor.
The choke stays off in it's normal setting, and needs to be manually adjusted to have the choke on for starting it when it is cold. I think when the piece broke originally, the choke would close off like it was supposed to. I adjusted it so it would not close unless you did it manually. If this were the issue, I would be happy as hell, with no egg on my face at all. I think I will bring the boat down home from up north this next week. then I can really get this thing back on line. |
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78 martinique- refloored, reinforced, stringers re glassed, re engineered interior
GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |
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horkn
Platinum Member Joined: September-10-2007 Location: Cedarburg, Wi Status: Offline Points: 1511 |
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I am going up north Tomorrow, so the boat will be here on Wednesday and I can figure this out:)
I have a feeling the fuel pump may be shot. That would explain why it can't take the load of hauling the boat out of the water under load. The accelerator pump may not be set right either, but my bet at this point is on the fuel pump. I mean, it is from 1978. I attempted to use a new automotive holley fuel pump when I had the check valve obstruction, but that didn't fix the issue, because the fuel couldn't get to the pump. I could try that fuel pump out and if that fixes it, then buy anew marine pump. I think my father has a dwell meter as well. |
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78 martinique- refloored, reinforced, stringers re glassed, re engineered interior
GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Tom, I sure hope this turns out to be the problem but don't count on it. My 64 has the original pump and I just put a rebuild kit in my 54's pump a year ago. Are you planning on getting a pressure gauge in line as recommended to check it? I still lean towards ignition. Maybe you should go up with a spare conversion modual as well. Per Chris, you should carry a spare on board anyway. I wonder what the next thing Chris will be recommending for spares. Maybe the engine?? |
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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I kept mine in perfect running order so there was never a need for spare parts on the boat, When you know how to turn wrenchs and tune an engine then there really isn't a need for tools or spare parts on the boat. Only time I had issue that I couldn't fix with out tools was the shaft breaking and a new coil going out within 5 hours of use.
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Luchog
Grand Poobah Joined: April-17-2007 Location: Argentina Status: Offline Points: 2135 |
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This must be the best post ever |
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horkn
Platinum Member Joined: September-10-2007 Location: Cedarburg, Wi Status: Offline Points: 1511 |
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Well, the boat is in my driveway now, so I can get to wrenching.
I will be getting the pressure gauge and also testing the dwell, and once I can locate a nice timing light that I can check total advance with I will do that too. Pete, that's really interesting about the stock fuel pumps lasting as long as they have for you. Maybe the ethanol added to our gas down here might have prematurely worn out the diaphragms in mine? PS, it has autolites in it, has since the gt40p's went on. They were cheaper and easier to find than the ngk's;) |
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78 martinique- refloored, reinforced, stringers re glassed, re engineered interior
GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Here's my 40 year old pump that was run for quite some time on ethanol. Had no problems,just decided to rebuild here it is finished |
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horkn
Platinum Member Joined: September-10-2007 Location: Cedarburg, Wi Status: Offline Points: 1511 |
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Wow, that's shiny now:)
So you can simply rebuild these things? Who sells the parts? |
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78 martinique- refloored, reinforced, stringers re glassed, re engineered interior
GT40P heads Edelbrock Performer intake acme 4 blade http://img.photobucket.com/albums/v64/horkn/fish/nautique.jpg |
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Gary S
Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Check with these these guys. You will need the numbers off of the pump mounting flange.
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jbear
Grand Poobah Joined: January-21-2005 Location: Lake Wales FL. Status: Offline Points: 8193 |
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Must be a message here...check out the headline on the newspaper. john |
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"Loud pipes save lives"
AdamT sez "I'm Canadian and a beaver lover myself"... |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Chris, I'm confused. Here's what you said May 10th:
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79nautique
Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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Pete do you always take stuff out of context?
we where talking about someone else's boat and the need to keep the points and condenser as back up, My comment was it would be easier if you just kept a spare module onboard instead, Didn't say I would, didn't say I was concerned, he was concerned so I suggested a spare module over the points and condensor. Why is keeping a spare module better than keeping points as a back up for an electronic conversion if your the type of person worried it's going to fail and leave you stranded? Becuase it only takes two screw to remove the module and plug in a new one and your on your way. Done in about five minutes maybe less and the engine will run fine. Now if your Electroinc conversion fails and you keep the points as back like YOU seem to suggest quite often. So the steps required for that are removing the conversion kit, mounting the plate for the points to mount to, wiring up the points, replacing the rotor with the old rotor, gapping the points, then jacking with the timing and/or gap untill you can get the engine started and adjust the timing by ear. So after about 1/2 hour if your lucky and are good at adjusting the timing on the fly then your back running. That is provided that you remembered to save the wire for the points to connect them to the coil, doesn't work with out it and you can't use the wires from the conversion unit either you just removed it, but no one ever talks about the wire that is needed to reinstall the points and saving it. Also the rotor is another common part over looked, some conversion kits actually want you to remove the cam lobe for the point's so you need to save that too What seems easier removing two screws in less than 5 minutes or jacking with several other items for a half hour or longer? For the record the only tools I ever carried if any at all, was a screw driver and a small adjustable wrench and a cork screw with a bottle opener on it. |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Chris,
I understand your point completely. You took my post out of content. It was meant as a joke and the reason I put the in it!! Yes, changing out a modual is easy but you know me I'm just not a fan of them. You'll agree that a complete distributor conversion is the way to go. Until the day comes when I do a non original distributor conversion, I'll stick with the points. If I run into a problem all I need is my wifes fingernail file!! |
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C-Bass
Platinum Member Joined: November-18-2008 Location: Columbus, IN Status: Offline Points: 1248 |
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Pete, you're an emotocon machine nowadays. I remember when you didn't believe in them.
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