Page 1 of 7 12345 ... LastLast
Results 1 to 10 of 70

Thread: More Questions!

  1. #1
    73SangerSuperJet
    First let me say I greatly appreciate everyoneÂ’s help on this board. I know I ask a lot of questions, but once I attain a certain amount of knowledge, I can begin helping others!
    Ok. Now on to the problems
    I took Muff Diver out to Sonoma yesterday (after fixing that vacuum leak) and ran her around. She sure sounded great at idle on the trailer, but she didnÂ’t perform that way! All is good until I get out of the no wake zone. At about (what I would estimate with no tach) 2500-3000 RÂ’s she begins to cut out/pop. Not knowing much about carbs, I messed with the screws on either side (I think they are idle fuel screws, I donÂ’t know). Some times she would sound good with occasional popping (sounded lean, I think). I thought maybe the timing (The whole timing thing is still a bit of a mystery to me), so I tried to set it to 9 BTC as apposed to 8 BTC. I have pertronix pointless setup. I tested vacuum at idle, its about 20lbs (which is good). If you really stab the gas, she just cuts out/ pops, but if you progressively hit the pedal, she acts a bit better. If anyone needs more info, please let me know.
    Thanks
    Louis
    [img]http://free.***boat.net/ubb/Avatars/Reader_Rides/Jet_Boats/anothermuff3.JPG[/img]
    [img]http://free.***boat.net/ubb/Avatars/Reader_Rides/Jet_Boats/anothermuff2.JPG[/img]
    Also, the ass on these boats dosn't look the same.... mine is more rounded (look closely)
    [img]http://free.***boat.net/ubb/Avatars/Reader_Rides/Jet_Boats/Tim_1.JPG[/img]
    [img]http://free.***boat.net/ubb/Avatars/Reader_Rides/Jet_Boats/anothermuff1.JPG[/img]

  2. #2
    Hal
    Need more info on engine.What size is your carb? What size jets do you have in it? Sounds like your lean. What is your timming at 3200 rpm? You should be reading your vacuum in inches of vacuum.
    [ February 10, 2003, 07:57 AM: Message edited by: Hal ]

  3. #3
    73SangerSuperJet
    I meant 20in, not lbs.... sorry ;-) This was all pertaining to this post here (My other questions) . I have a holley that was on the stock truck intake and ran fine. It is a single pumper, and I belive it is a 650cfm. How do I check timing at 3200 rpm? I am new to jet boat game, so please bear with me.
    Thanks again,
    Louis

  4. #4
    Wet Dream
    Sounds like a timing problem. Might not be advancing properly. 32 degrees at 3000 revs is where you want to be. Off subject, but something tells me that the bro sitting in the passenger seat behind the driver in the black boat isn't too keen on the swimming thing. He's a floater.
    [ February 09, 2003, 01:03 PM: Message edited by: Wet Dream ]

  5. #5
    Jungle Boy
    Wet Dream:
    Sounds like a timing problem. Might not be advancing properly. 32 degrees at 3000 revs is where you want to be. Off subject, but something tells me that the bro sitting in the passenger seat behind the driver in the black boat isn't too keen on the swimming thing. He's a floater. Too funny - I noticed the Bro too. Set your timing with your boat on the trailer. Make sure your trailer hook up won't let it crawl up and smoke your truck while you're doing it.

  6. #6
    73SangerSuperJet
    how do I check the timing?

  7. #7
    73SangerSuperJet
    Also, how do I set those two screws on the carb I was messing with back to optimal settings?
    Louis

  8. #8
    Wet Dream
    Use a timing light have someone run your throttle and have another turn your distributor. Your throttle man should hold the pedal steady at 3000 rpm and your dist man should turn the dist to 32 degrees and lock it down there.

  9. #9
    Cantrip
    Oh boy, this is going to be long, what you need to do is get the boat sitting level on the trailer pretty close to how it would sit in the water. Now, check your carb, there are 2 brass screw heads, kind of large, flat head on either side on both the primary and secondary sides. Run the boat for a few min in the drivway, take off the screw on the side/front of the carb, if gas comes out, you need to adjust your needle and seat valve which is the large flat head screw on top of the carb, this adjusts the fuel level in the bowls and you need to move it down. If no gas comes out, you need to move the level up. This is easier than it sounds. Loosen the very large flathead screw on the top of the carb, this screw has a nut on under it, so loosen this screwand move the nut and that will move the level up or down, depending on where you need to move yours. What your to do here is make it so the gas will be at the very bottom of the brass flat screw heads on the side of the carb, so get the levels about there and start shaking the boat (lightly), if gas comes out, you are at the right level. You will need to have the boat running to check the level and off to adjust. Once these are set, now its time to adjust those little teeny screw on the side, your idle mixture screws. Start the boat up, it should be idling ok, now turn the litle screw in untill the boat starts running funny then turn it out a half turn. VIOALLLAAA!!! Adjusted carb. Now the timing issue, you need a timing light and you need to make sure there are marks on the crank dampener. If those are there, hook the timing light up to the battery and #1 cylinder, turn the boat on and set the timing to 10-14 degrees BTDC, turn the distributor to advance or retard. Keep the light on the crank and rev the engine like wetdream said, I think its 28-34 is ok for 3000 rpm's.I'll post pics...
    These are the two brass screw heads that you need to remove to check the fuel level, with these removed gas should barely dribble out of these holes
    [img]http://free.***boat.net/ubb/Avatars/Forum_Graphic_Depot/P10100032.JPG[/img]
    This is the needle and seat float adjuster, there are two of these, one on the back and one on the front, loosen the screw and move the nut accordingly to move the fuel level up or down, I dont know which way moves the level up or down (if anyone knows, chime in) but you will be able to know after the first attempt
    [img]http://free.***boat.net/ubb/Avatars/Forum_Graphic_Depot/P10100022.JPG[/img]
    These are the idle mixture screw, turn these in till the motor starts idling hard then back off a half turn
    [img]http://free.***boat.net/ubb/Avatars/Forum_Graphic_Depot/P10100011.JPG[/img]
    and this is a garden cart......
    [img]http://free.***boat.net/ubb/Avatars/Forum_Graphic_Depot/P10100044.JPG[/img]
    [ February 09, 2003, 03:01 PM: Message edited by: Cantrip ]

  10. #10
    Tim_T
    Its funny you guys noticed that because when the wife took that picture we were sitting there giving all kinds of shit for having it on. And you're right he is a floater. Not a very good swimmer at all. Too funny.
    Tim

Page 1 of 7 12345 ... LastLast

Similar Threads

  1. 2 questions
    By dgie in forum Jet Boats
    Replies: 1
    Last Post: 01-13-2009, 08:15 AM
  2. Blower questions, questions, questions
    By 1968Droptop in forum Gear Heads
    Replies: 15
    Last Post: 03-24-2007, 05:16 AM
  3. nailhead powered v drive questions questions help
    By 1967CAMPBELL in forum V-Drives
    Replies: 7
    Last Post: 10-20-2006, 10:12 AM
  4. BBC 402 questions
    By Marlin455 in forum Gear Heads
    Replies: 11
    Last Post: 12-19-2004, 03:20 AM
  5. More questions from the new guy.
    By iggdog in forum Bench Racers
    Replies: 5
    Last Post: 10-10-2001, 08:05 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •