Timing not advancing |
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asuj158
Newbie Joined: April-12-2023 Location: Indianapolis Status: Offline Points: 25 |
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Posted: June-14-2023 at 8:33pm |
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Hey guys! So got the boat running pretty well thanks to your guy’s help. However I have one last lingering issue: the timing does not advance nearly as much as needed past 3000rpm.
I have timing set to 10 at idle. However when I rev to 3000 or over it only gets to around 20. Rpm maxes out around 3900 and can only get to about 40mph. Things I have replaced or verified so far: 1. New spark plugs gapped to .035 2. New wires 3. New coil 4. New resistor before coil 5. New cap and rotor 6. New condenser 7. New diaphragm for secondaries 8. Rebuilt front bowl/front part of carb 9. New springs for advanced timing 10. Verified correct spark plug wire order 11. Verified correct 14x16 prop. Any ideas or things to try or look at? Thank you for the help! |
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Jonny Quest
Grand Poobah Joined: August-20-2013 Location: Utah--via Texas Status: Offline Points: 2979 |
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For the 1989 Ski Nautique? SBF 351 Windsor? Standard rotation, as you have a 14X16 prop and that means 1.23:1 tranny. Take a few photos of the distributor...particularly of the innards and the mechanical advance mechanism. We can help you get it sorted out. Post pics on this thread.
JQ
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Current
2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
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asuj158
Newbie Joined: April-12-2023 Location: Indianapolis Status: Offline Points: 25 |
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Correct 1989 Ski Nautique 2001 Ford 351. I’ll post pics in a bit.
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asuj158
Newbie Joined: April-12-2023 Location: Indianapolis Status: Offline Points: 25 |
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How the heck do I post pictures on here
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11116 |
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How about a brand and part number for these new springs that may or may not be the right ones for your application PS.................. In your last thread you never did answer the question about the 18 volts you were apparently seeing
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11116 |
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Picture posting these days, use IMGBB, read below, watch the video,
You can do it with other photo hosting services, but these directions work for IMGBB. You need to sign up for a free account. Once you do it, it's really pretty easy,........ a lot easier than the CCF way that doesn't work any more
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asuj158
Newbie Joined: April-12-2023 Location: Indianapolis Status: Offline Points: 25 |
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Bought them from nautique parts:
https://nautiqueparts.com/kit-distributor-advance-spring/ |
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asuj158
Newbie Joined: April-12-2023 Location: Indianapolis Status: Offline Points: 25 |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11116 |
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The big spring on the bottom in your picture, with the stretched out looking end.....is it tight with tension on it or can it wiggle around with about an 1/8 to 3/16 of an inch of free play?
The slots in the advance limiter control how far the weights can advance as the speed goes up and the weights overcome the spring tension. On that distributor with the nylon advance limiter, if you have 10 degrees initial, you'll be lucky to get 30 degrees total. (10 initial plus 20 from the weights) If the combined force of the springs is too heavy, you won't get full advance Normally the big spring has the free play mentioned above and isn't under any tension at all until up around 3000 rpm, and then as it gets stretched, it slows down the advance. Until then it's just along for the ride and the thin spring is doing all the work.. Here's a picture of a big spring (at the top)with the right amount of free play and also the thin spring with some tension on it at rest. Just because they came from Nautiqueparts doesn't mean they're right for your distributor. You wouldn't be the first one to have trouble with those same springs |
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asuj158
Newbie Joined: April-12-2023 Location: Indianapolis Status: Offline Points: 25 |
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Keno thank you for the info. I just said screw it and bought a DUI distributor from discount inboard marine they had in stock for my motor. Hopefully it fixes my issue and the boat runs better
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11116 |
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That's the easy way out and it'll fix your advance issues
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asuj158
Newbie Joined: April-12-2023 Location: Indianapolis Status: Offline Points: 25 |
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I hope so 😂 |
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asuj158
Newbie Joined: April-12-2023 Location: Indianapolis Status: Offline Points: 25 |
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Keno is there a write up on replacing the original distributor with the DUI on 351 from a 2001? I saw the one going from protec to dui but not one for my vintage of boat. |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11116 |
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Are you familiar with installing or replacing a distributor and just wondering about the wiring or maybe looking for installation instructions too?
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asuj158
Newbie Joined: April-12-2023 Location: Indianapolis Status: Offline Points: 25 |
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Wondering about the wiring more than anything. Can I reuse the wires that go to the coil? My guess is physical install is almost exactly the same as a normal one.
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11116 |
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The wiring is easy, but some people like to complicate it.
I'll post a diagram later today that should help, but basically you bypass/eliminate your ballast resistor and run the wire that went to the coil to the power lead on the DUI distributor and the tach connection on the DUI gets hooked to your original gray tach wire in the harness. One more wire can be added to help give the best starting voltage, that'll be in the diagram
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asuj158
Newbie Joined: April-12-2023 Location: Indianapolis Status: Offline Points: 25 |
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That would be awesome! |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11116 |
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Here's a hand drawn diagram The Red wire into the ballast resistor is from the key switch. it starts as a purple wire at the key switch but at a crimp for multiple connections in the harness it turns into a Red wire The purple from the ballast resistor was the feed to your old coil and you can use that to feed the positive terminal on the DUI distributor. The jumper on the ballast resistor takes the resistor out of the circuit so that full voltage is getting to the DUI coil. The other jumper from the resistor to the "I" terminal on the starter solenoid/relay gives max voltage to the coil when the starter is running and after the engine is running and the key is in Run, the alternator will be supplying about 13.5 to 14 volts. This jumper would be optional but easy to do You can rearrange the wiring by removing the ballast resistor completely and hooking the associated wires (the Red, Purple and the optional bypass) together for a "cleaner" look There are other ways using relays etc to supply the power to the coil, but this works well. |
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asuj158
Newbie Joined: April-12-2023 Location: Indianapolis Status: Offline Points: 25 |
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TRBenj
Grand Poobah Joined: June-29-2005 Location: NWCT Status: Offline Points: 21186 |
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The diagram is fine but overkill, even.
No need for the jumper on the resistor, just put the 2 wires on the same post. I skip the other jumper going to the i terminal on the solenoid also. The 2 wires the DUI needs are attached to the coil (gray = tach and purple = ign, the latter connects to the dui “batt” terminal). Female spade terminals work for the dui connections if you didn’t buy the special HEI clips. The bigger issue will be spark plug wires- the HEI has male terminals so your old wires won’t swap. I don’t like any of the off-the-shelf wire options I’ve tried, I prefer the universal wire kits and make the lengths match what I need. Taylor spiro pro is my preference. Best performance will be achieved if you open up your plug gaps to .055”. |
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asuj158
Newbie Joined: April-12-2023 Location: Indianapolis Status: Offline Points: 25 |
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I appreciate the info. I bought a set of wires with the DUI from Skidim. Hopefully they work |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11116 |
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The really "clean" way that might boggle somebody's mind if they're not familiar with how the solenoid/relay is built is to ditch the resistor completely and hook the Red wire and the Purple wire together at the "I" terminal. It accomplishes both bypasses with no extra wires and you get rid of the resistor too.
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11116 |
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asuj158
Newbie Joined: April-12-2023 Location: Indianapolis Status: Offline Points: 25 |
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Well… got the dui installed and seems like the same issue. 40mph and 3900 rpm. Any ideas?
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asuj158
Newbie Joined: April-12-2023 Location: Indianapolis Status: Offline Points: 25 |
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If the secondaries weren’t doing their job would that cause the loss in rpm?
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11116 |
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You'll lose some RPM's and speed.
Here's a link to an old thread It gives an easy way to check that they're opening if you're all by yourself and in that case their was a 300 RPM and 3 MPH loss. Somebody else might get different results, but on a 351 with secondaries that don't work, you'll lose some power And just to be sure you know.............they'll never open if you rev the engine in neutral, you have to be cruisin' on the water with load on the engine for the secondaries to operate Usually somewhere in the 3500 ish RPM range they start opening and like in the link they don't open all the way on a stock or mildly modified 351
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asuj158
Newbie Joined: April-12-2023 Location: Indianapolis Status: Offline Points: 25 |
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Would this affect the timing? |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 11116 |
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Not with your new distributor.
DUI advertises 24 degrees of advance at 3000 RPM on top of the initial, but different people get different results
It should be installed at around 10 to 12 ish degrees advance at idle and with the rest of the advance fully in at 3000 rpm, you'll have full advance of say 30 to 34 degrees by 3000 RPM So full advance would be in before the point that the secondaries should be opening. |
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