Forum: Drive Train / Propellers
06-22-2023, 04:06 PM
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Replies: 6
Views: 997
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Forum: General Interest
02-28-2022, 11:11 AM
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Replies: 5
Views: 1,180
Dave, about 1300 RPM and that appears to be...
Dave, about 1300 RPM and that appears to be limited by fuel.
The current theory on failure suggests that there had been saltwater leakage from the side clean out plate fasteners which weakened...
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Forum: General Interest
02-27-2022, 06:23 PM
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Replies: 5
Views: 1,180
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: 3,247
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, 11:16 PM
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Replies: 123
Views: 29,675
I do not get your point.
I concur that you...
I do not get your point.
I concur that you get greater vertical force from a fine thread stud than from a coarse thread stud for the same amount of torque applied to the nut.
The issue that...
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Forum: Overhaul
10-29-2021, 04:33 PM
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Replies: 123
Views: 29,675
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: 6,904
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: 6,904
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, 06:55 PM
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Replies: 55
Views: 6,904
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Forum: Troubleshooting
10-05-2021, 06:10 PM
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Replies: 55
Views: 6,904
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: 1,393
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: Fuel System
07-28-2021, 09:17 PM
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Replies: 14
Views: 1,590
Rough Seas?
DonC,
You indicated in you initial post that you did a good deal of motor sailing due to wind and waves and time constraint on the day prior to your starting issue. I had a similar incident many...
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Forum: General Interest
07-26-2021, 12:05 PM
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Replies: 10
Views: 2,631
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: 1,460
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: Drive Train / Propellers
07-08-2021, 11:54 AM
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Replies: 3
Views: 1,175
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Forum: Troubleshooting
05-03-2021, 01:59 PM
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Replies: 21
Views: 5,410
Sorry that I mis-interpreted your video. I saw...
Sorry that I mis-interpreted your video. I saw linkage still attached to the engine shift lever and assumed everything was still hooked up. Upon further inspection of the video, I see a bracket of...
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Forum: Troubleshooting
05-03-2021, 01:02 PM
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Replies: 21
Views: 5,410
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: 9,640
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Forum: Troubleshooting
09-14-2020, 10:33 PM
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Replies: 15
Views: 2,537
Valve Seat
Have you per chance removed the needle valve seat? If so, did you replace the gasket between the valve seat and the carb body? My experience with that gasket is that it is good for one use only....
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Forum: Troubleshooting
09-14-2020, 09:01 PM
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Replies: 15
Views: 3,282
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: 3,983
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: 8,621
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: Drive Train / Propellers
12-12-2019, 08:58 PM
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Replies: 11
Views: 3,586
Indigo Prop
Since I have had no negative feedback from other Tartan 27 owners with the Indigo prop, I can only assume that the clearance you have from the deadwood is sufficient.
You should hand dress the...
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Forum: Drive Train / Propellers
12-12-2019, 10:56 AM
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Replies: 11
Views: 3,586
Propeller Deterioration
The pitting you see on the prop is the result of Galvanic Activity. Since you do not have a zinc on the shaft, the prop is the sacrificial element. That is the concept behind the Indigo "No...
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Forum: Troubleshooting
08-08-2019, 08:04 PM
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Replies: 18
Views: 3,211
Fuses?
I think there was at least one little glass tubular fuse on the PCB but I cannot say for sure.
+1 on Potting
Tom
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