Forum: Drive Train / Propellers
06-22-2023, 04:06 PM
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Replies: 6
Views: 946
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Forum: General Interest
02-27-2022, 06:23 PM
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Replies: 5
Views: 1,153
Atomic 4 with 3 Cylinders?
I have been coaching a new A4 owner as he has been navigating his way down the ICW. It all started with him not being able to make more than about 3 knots and he contacted me to see if there was...
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Forum: Troubleshooting
11-12-2021, 05:16 PM
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Replies: 23
Views: 3,214
Dirty Fuel
Pitching in big waves brings to mind stirring up muck lying in the bottom of your fuel tank. Take a look at your in line fuel filter and also drain the carb bowl and see what comes out. If there is...
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Forum: Overhaul
10-29-2021, 04:33 PM
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Replies: 123
Views: 29,366
Get the small nuts or sacrifice a socket by...
Get the small nuts or sacrifice a socket by grinding it down to fit. The thermostat housing studs are head studs just like all of the others except a little longer. Using a socket head capscrew is...
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Forum: Troubleshooting
10-07-2021, 03:20 PM
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Replies: 55
Views: 6,780
Rick,
The thought just occurred to me that...
Rick,
The thought just occurred to me that since you have a C&C32, was it perhaps built in Canada? For many years a "de-tuned" version of the Atomic 4 known as the "Stevedore" was sold in Canada....
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Forum: Troubleshooting
10-05-2021, 09:30 PM
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Replies: 55
Views: 6,780
Rick,
It sounds like the pitch of your...
Rick,
It sounds like the pitch of your Indigo Prop is too low, maybe down in the 6 range. That is about the only thing that would explain its poor performance. The only other thing that would...
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Forum: Troubleshooting
10-05-2021, 06:10 PM
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Replies: 55
Views: 6,780
Rick,
I see from my records that you had...
Rick,
I see from my records that you had Indigo Prop S/N 1474 on a C&C 30. Indigo props are installed on nearly 60 C&C 30s with no reports of the issues you have outlined.
With your 25 ft...
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Forum: Drive Train / Propellers
08-07-2021, 09:35 PM
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Replies: 3
Views: 1,373
Higher RPM
There are two main reasons to achieve higher WOT engine RPM with your direct drive Atomic 4.
The first has to do with increasing cruise RPM to somewhere around 2000. Many A4s in the fleet are...
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Forum: General Interest
07-26-2021, 12:05 PM
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Replies: 10
Views: 2,597
Boat Speed
What speed is the boat making at WOT? Typically, over-propped direct drive A4s will get a boat up to hull speed but the RPM will be in the range you are finding. Such a setup is hard on the engine...
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Forum: Troubleshooting
07-08-2021, 01:16 PM
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Replies: 5
Views: 1,438
You certainly need to check your engine to prop...
You certainly need to check your engine to prop shaft alignment as a first step. Assuming that a blade(s) of the prop were not damaged during the splashing process, one other thought comes to mind...
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Forum: Troubleshooting
05-03-2021, 01:02 PM
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Replies: 21
Views: 5,354
Indigo Prop for Sure
That is indeed an indigo prop, no question about it. And it is 10” in diameter.
You should try taking the shift linkage loose from the engine and see if the lever on the engine will go farther in...
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Forum: Troubleshooting
01-12-2021, 01:14 PM
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Replies: 70
Views: 9,497
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Forum: Troubleshooting
09-14-2020, 09:01 PM
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Replies: 15
Views: 3,241
Electronic Ignition Thoughts
quentind,
I am sorry to hear that you have had problems with you Indigo AT4 ignition.
Let me first ask if your module has a Red LED on one end of the module? If not, then the module is about...
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Forum: Electrical
04-30-2020, 10:22 AM
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Replies: 11
Views: 3,922
Proper Torque on plugs
A spark plug that is not properly seated will have less heat transfer to or from the head. A poorly seated plug will run hotter than a properly seated plug. An easy check.
Tom
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Forum: Introductions
04-24-2020, 07:33 PM
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Replies: 22
Views: 8,548
Carb Needle
Fuel pressure and gravity move the needle down and the float lifts it up to shut off fuel and modulate the level of fuel in the bowl of the carburetor. Some carbs do have a little wire clip that I...
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Forum: Troubleshooting
05-27-2019, 02:54 PM
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Replies: 23
Views: 9,371
Vacuum Leak
Now that you have ruled out the PCV valve itself, try carefully squirting a little starting fluid around the two gasketed joints on the PCV spacer plate with the engine idling. If the engine speed...
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Forum: Fuel System
10-05-2018, 01:17 PM
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Replies: 8
Views: 3,643
If the rebuild was as poor as you indicate, the...
If the rebuild was as poor as you indicate, the rebuilder may have removed the needle valve seat and replaced the seat using the same gasket that was there originally. I have had that same experience...
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Forum: Cooling System
08-09-2018, 08:24 PM
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Replies: 11
Views: 4,345
Indigo FWC Systems
All Fresh Water Cooling Systems (antifreeze) require two separate pumps to circulate the raw water and the antifreeze.
Indigo offers two distinctly different FWC systems for those applications...
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Forum: Ericson
06-05-2018, 09:29 AM
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Replies: 237
Views: 104,425
My guess is the shaft has backed out of the...
My guess is the shaft has backed out of the coupling for the most part and probably just machined off maybe an eighth of an inch of the key. You may not have to remove the coupling half. Just try...
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Forum: Cooling System
03-31-2018, 07:01 PM
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Replies: 15
Views: 6,521
Dole
In my opinion, the only thing really wrong with the Dole thermostat is that they are quite old now and it is just about impossible to acquire a new thermostat itself. It is true that you have to pay...
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Forum: Troubleshooting
11-09-2017, 12:00 PM
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Replies: 4
Views: 2,581
What type of pressure gauge?
Is your pressure gauge mechanical or electrical? If electrical, you have to attach a ground wire between the engine and the filter base in order for the gauge to work.
Tom Stevens
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Forum: Troubleshooting
11-04-2017, 09:06 PM
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Replies: 18
Views: 8,569
Overheating or Not?
There always seem to be a couple of cases going on at any given time where in an owner has an engine that is overheating. Despite trying all of the normal remedies and proven troubleshooting...
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Forum: Troubleshooting
10-20-2017, 11:45 PM
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Replies: 91
Views: 21,026
Back of the Envelope
I think we can get a little better idea of Clark800's cooling situation with a simple thermodynamic analysis. Here goes my shot at it:
You can reasonably assume that an A4 running at 2000 RPM in...
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Forum: Troubleshooting
10-12-2017, 09:48 PM
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Replies: 91
Views: 21,026
Bad Oil Pump
While 60 psi at a cold start up is higher than we would like to see, my experience with the Indigo filters tells me that it can be significantly higher on A4s with great oil pumps. The filter...
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Forum: Cooling System
10-12-2017, 10:24 AM
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Replies: 36
Views: 6,159
Steam in Exhaust
Steve, I re-read your posts and the "Steam in the Exhaust" statement kept jumping out at me. After reviewing your engine images again, it appears that your raw water goes through your strainer,...
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