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Search: Posts Made By: Dave Neptune
Forum: Cooling System 01-27-2023, 09:21 PM
Replies: 15
Views: 506
Posted By Dave Neptune
Pete, I would get the exhaust fixed as it is now...

Pete, I would get the exhaust fixed as it is now a known problem. The exhaust if old enough to crack and leak could very well be "plugged up" which is a common cause of bogging and loss of power....
Forum: Fuel System 01-26-2023, 03:57 PM
Replies: 4
Views: 199
Posted By Dave Neptune
Joe, the last one I remember playing with the...

Joe, the last one I remember playing with the adj-jet and an 02 sensor was Hanley. I do remember he would have to adjust for various cruising speeds.

I used the adj-jet only to find the weaknesses...
Forum: Fuel System 01-13-2023, 02:04 PM
Replies: 10
Views: 689
Posted By Dave Neptune
The A-4 has an updraft carburetor which sits well...

The A-4 has an updraft carburetor which sits well below the "intake runners" in the manifold. The "excess" fuel if there is any before cranking would run out the carb and not get into the cylinders....
Forum: Cooling System 01-01-2023, 09:05 PM
Replies: 15
Views: 506
Posted By Dave Neptune
The compression numbers look OK, nothing to be...

The compression numbers look OK, nothing to be concerned with.

You can install a 3/8 gate valve in the "bypass line" with little effort. You can use slip fittings or pipe to attach to the t-stat...
Forum: Cooling System 12-30-2022, 09:22 PM
Replies: 15
Views: 506
Posted By Dave Neptune
Question Info needed

First welcome to the MMI Afourian Forum.

Lets talk cooling first off. Don't worry about the t-stat just yet!! You state that no water drained out of the pump when the cover was removed, was the...
Forum: Electrical 12-25-2022, 09:13 PM
Replies: 11
Views: 538
Posted By Dave Neptune
I had no refrigeration so I usually left the...

I had no refrigeration so I usually left the battery switch to both. If I was staying at Catalina for more that 4 days I would switch to house. I never ran my batteries down enough that the engine...
Forum: General Maintenance 12-19-2022, 10:23 AM
Replies: 11
Views: 592
Posted By Dave Neptune
Cables at a marine store like Tiffanies (West...

Cables at a marine store like Tiffanies (West Marine) and choke cable at an auto parts.

I think our host MMI would have a choke cable.

Dave Neptune :cool:
Forum: General Maintenance 12-17-2022, 10:20 AM
Replies: 11
Views: 592
Posted By Dave Neptune
Artj, the only way I have had any luck with shift...

Artj, the only way I have had any luck with shift or throttle cables is to remove them to inspect the "casing" for integrity. If they were good hang them vertically and add "oil" to the cable and let...
Forum: Cooling System 12-13-2022, 09:14 PM
Replies: 13
Views: 1,731
Posted By Dave Neptune
Thumbs up Good point Thatch

Increasing the water flow and or pressure to get the water temp back to where it was is not fixing the problem, it is only masking it not "fixing" it.

Dave Neptune :cool:
Forum: Troubleshooting 12-11-2022, 11:27 AM
Replies: 2
Views: 413
Posted By Dave Neptune
Have you tried operating the trans with the...

Have you tried operating the trans with the engine off?

First disconnect the shifting cable and remove the cover. Then see if you can rotate the shaft by hand in neutral. The only friction you...
Forum: Ignition System 11-30-2022, 10:20 AM
Replies: 15
Views: 1,973
Posted By Dave Neptune
What Neil said and check the plug. The A-4 came...

What Neil said and check the plug. The A-4 came from the factory with a "plug in harness" to connect to the ignition/gage panel. We here call it the "trailer plug". It is a plug just like the lights...
Forum: Ignition System 11-22-2022, 03:10 PM
Replies: 6
Views: 969
Posted By Dave Neptune
Yes and no, use the meter from the post to ground...

Yes and no, use the meter from the post to ground with the key at start. To check the key there are two tests first from the hot side to ground then from the "switched to start side" of the key...
Forum: Ignition System 11-21-2022, 11:01 AM
Replies: 6
Views: 969
Posted By Dave Neptune
First double check the key-switch to be sure the...

First double check the key-switch to be sure the solenoid is getting a full voltage signal.
Did you wiggle and/or keep twisting the key to start? Sometimes a tap with a screw driver or lightly with...
Forum: Drive Train / Propellers 11-18-2022, 11:27 AM
Replies: 32
Views: 1,723
Posted By Dave Neptune
3 types

In my 45 plus years of operating a sailboat with an inboard engine I have used both dripless and packing styles in 3 ways.

First is the packing style packed with "flax" type seals. These are a PIA...
Forum: Cooling System 11-09-2022, 06:16 PM
Replies: 8
Views: 528
Posted By Dave Neptune
Al, I did not like the warm and cold proximity to...

Al, I did not like the warm and cold proximity to the sensor either and found it troublesome to get my bypass adjusted to where I could leave it alone at various speeds. What I did was to plug the...
Forum: Troubleshooting 11-09-2022, 12:41 PM
Replies: 4
Views: 575
Posted By Dave Neptune
First determine the state of the plugs (wet or...

First determine the state of the plugs (wet or dry) before doing anything. If the plugs are dry check spark. If they are wet, take out all of the plugs and be sure the water intake valve is closed!...
Forum: Introductions 10-31-2022, 10:58 AM
Replies: 8
Views: 729
Posted By Dave Neptune
First yes you should have the double action...

First yes you should have the double action t-stat for the "system" to work properly. I'd first try going without the t-stat and adjust the temp via "flow" with the bypass hose and a valve or clamp....
Forum: Fuel System 10-31-2022, 10:49 AM
Replies: 19
Views: 1,828
Posted By Dave Neptune
At 1 psi the engine will mot get enough fuel to...

At 1 psi the engine will mot get enough fuel to make much power at all. You need 2~3 at least. Time to check the pump and check valves. Not a bad job at all.

Also do be sure that the clamps and...
Forum: Fuel System 10-25-2022, 10:02 PM
Replies: 4
Views: 597
Posted By Dave Neptune
If you have any question as to the integrity of...

If you have any question as to the integrity of the fuel lines REPLACE them. A loose fitting, clamp or hose will also keep the pump from pumping by allowing air to be sucked in.

The crud in the...
Forum: General Interest 10-10-2022, 11:28 AM
Replies: 7
Views: 741
Posted By Dave Neptune
Question Noises

Did the "tapping" start abruptly? Valve tapping noise usually increases over time not all of a sudden unless something breaks. If the noise did start all of a sudden it could be a broken valve spring...
Forum: Troubleshooting 10-01-2022, 11:57 AM
Replies: 8
Views: 689
Posted By Dave Neptune
If BOTH pumps are functioning (flowing well) it's...

If BOTH pumps are functioning (flowing well) it's time to look at the HX as it may be fouled or plugged.

Dave Neptune :cool:
Forum: General Interest 09-25-2022, 12:06 PM
Replies: 3
Views: 561
Posted By Dave Neptune
How many RPM's are you talking about? If the prop...

How many RPM's are you talking about? If the prop is fouled and the engine is at idle speed it would die once the throttle was advanced as there would be little flow to carry fuel to the cylinders...
Forum: Drive Train / Propellers 09-21-2022, 07:59 PM
Replies: 2
Views: 299
Posted By Dave Neptune
First welcome to the MMI forum. Yes to...

First welcome to the MMI forum.

Yes to draining the oil.

Yes it can be done in the water by being prepared and getting everything loose when ready to slide the shaft.

Once you have cleaned...
Forum: Troubleshooting 09-20-2022, 02:29 PM
Replies: 12
Views: 866
Posted By Dave Neptune
Good seals

The info you are getting is good and I would like to mention one more thing.

Unless the "hose fittings" are good and snug AND the "seal" on the strainer usually an "O-ring" is properly sealed it...
Forum: Drive Train / Propellers 08-30-2022, 01:31 PM
Replies: 7
Views: 1,122
Posted By Dave Neptune
Lightbulb My trans popping out of gear!!!!!

When I bought my boat it would slip out of gear when more that half throttle was applied:eek:. My problem was that the trans forward adjusting ring was set to tight and would not go into the...
Showing results 1 to 25 of 500

 
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