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Search: Posts Made By: JOHN COOKSON
Forum: Fuel System Today, 12:32 AM
Replies: 1
Views: 23
Posted By JOHN COOKSON
Try servicing the advance (under the distributor...

Try servicing the advance (under the distributor breaker plate).
You will probably need to reset the timing since the advance influences timing.

ex TRUE GRIT
Forum: Cooling System 10-17-2021, 08:52 PM
Replies: 14
Views: 6,149
Posted By JOHN COOKSON
This is why I always used muriatic acid rather...

This is why I always used muriatic acid rather than vinegar. It can be done and over in a short time period compared to letting vinegar soak for a few days.

ex TRUE GRIT
Forum: Troubleshooting 10-15-2021, 12:47 AM
Replies: 27
Views: 733
Posted By JOHN COOKSON
In order for your engine to start and run you...

In order for your engine to start and run you need fuel, spark and compression delivered to the cylinders. The spark needs to be delivered at the correct time and the choke need to be functioning...
Forum: Troubleshooting 10-14-2021, 12:51 AM
Replies: 27
Views: 733
Posted By JOHN COOKSON
Any chance the key was left on for a spell while...

Any chance the key was left on for a spell while troubleshooting when the engine wasn't running?
On my boat the only time the key was in the slot was when the engine was being cranked or was...
Forum: Troubleshooting 10-14-2021, 12:01 AM
Replies: 27
Views: 733
Posted By JOHN COOKSON
A failing (or failed) coil behaves in this...

A failing (or failed) coil behaves in this manner.
Try checking for spark immediately after a shut down.

ex TRUE GRIT
Forum: Troubleshooting 10-10-2021, 07:57 PM
Replies: 46
Views: 1,022
Posted By JOHN COOKSON
What is the drip rate after you loosened the...

What is the drip rate after you loosened the packing nut? Or do you have some sort of dripless packing?

ex TRUE GRIT
Forum: Troubleshooting 10-09-2021, 04:35 PM
Replies: 46
Views: 1,022
Posted By JOHN COOKSON
Sticky valve? Try running the engine for an hour...

Sticky valve? Try running the engine for an hour at cruise RPM.

ex TRUE GRIT
Forum: Troubleshooting 10-07-2021, 03:29 PM
Replies: 9
Views: 294
Posted By JOHN COOKSON
Ae you using any choke when you warm start? A...

Ae you using any choke when you warm start? A properly tuned A4 needs brief full choke to start even when the engine is warm.

ex TRUE GRIT
Forum: Troubleshooting 10-05-2021, 06:06 PM
Replies: 46
Views: 1,022
Posted By JOHN COOKSON
MY EXPERIENCE WITH REVERSE

Not trying to be argumentative here...........

I found after that awhile I got the feel of how my boat handled in reverse and I didn't mind the fact that reverse control wasn't quite should be....
Forum: Troubleshooting 10-04-2021, 09:03 PM
Replies: 46
Views: 1,022
Posted By JOHN COOKSON
Are you running on three cylinders not four? Easy...

Are you running on three cylinders not four? Easy to check. Pull the spark plug wires one at a time while the engine is running under load and note any change in performance.

ex TRUE GRIT
Forum: Overhaul 10-04-2021, 01:25 PM
Replies: 4
Views: 336
Posted By JOHN COOKSON
Exactly where was the water leaking from at the...

Exactly where was the water leaking from at the exhaust manifold? Perhaps all you need is to tighten the clamp or install a new hose thermostat -> manifold?

ex TRUE GRIT
Forum: Troubleshooting 09-30-2021, 11:10 AM
Replies: 27
Views: 733
Posted By JOHN COOKSON
DO YOU HAVE AN ELECTRONIC IGNITION?

If you have an electronic ignition and the coil does not have the correct amount of resistance (to little resistance) it can run at a to hot temperature and fail prematurely.

ex TRUE GRIT
Forum: Troubleshooting 09-30-2021, 09:52 AM
Replies: 27
Views: 733
Posted By JOHN COOKSON
Burnt plastic smell makes me think of wiring that...

Burnt plastic smell makes me think of wiring that is shorted to ground.
If the wiring is burning few summary tests of the various circuits should lead you to the problem.
For example see if coil +...
Forum: Troubleshooting 09-29-2021, 01:07 AM
Replies: 5
Views: 704
Posted By JOHN COOKSON
R\E THE IDLE

To get a satisfactory idle you will need to start with the ignition system. The dwell and timing need to be set to spec and the advance needs be working correctly.
Once the ignition "side" is...
Forum: Fuel System 09-25-2021, 11:10 AM
Replies: 8
Views: 325
Posted By JOHN COOKSON
Dave Could it be the screw for the poppet...

Dave
Could it be the screw for the poppet valve? I no longer have a boat so I can't check myself.

ex TRUE GRIT
Forum: Troubleshooting 09-24-2021, 09:09 PM
Replies: 6
Views: 289
Posted By JOHN COOKSON
Is the shift lever firmly attached to the...

Is the shift lever firmly attached to the transmission? Or maybe the linkage is not being held down tightly?
Best I can do for now......

ex TRUE GRIT
Forum: Fuel System 09-23-2021, 07:08 PM
Replies: 8
Views: 9,122
Posted By JOHN COOKSON
DIAGNOSTICS?

Sounds more like an electrical problem than a fuel problem to me.
After the next shutdown check for spark immediately after the shutdown. Pull the the center wire out of the distributor cap and hold...
Forum: Troubleshooting 09-17-2021, 10:21 AM
Replies: 3
Views: 360
Posted By JOHN COOKSON
Attach a hose to the pump inlet. Put some water...

Attach a hose to the pump inlet. Put some water in a paper cup and pinch to form a spout and pour the water down the hose till full. Turn the engine a few times to get the air out of the pump then...
Forum: Introductions 09-08-2021, 03:14 AM
Replies: 3
Views: 635
Posted By JOHN COOKSON
If the engine has been in an area where the...

If the engine has been in an area where the temperature gets below freezing in the winter the first thing I would do is pressure test the block to be sure there is no freeze damage to the cooling...
Forum: Cooling System 09-07-2021, 09:45 PM
Replies: 28
Views: 1,486
Posted By JOHN COOKSON
If by chance the shaft is scored where the...

If by chance the shaft is scored where the packing contacts it the packing will never be right.

Water is going through the engine or around the engine via the bypass? By removing the thermostat...
Forum: Cooling System 09-07-2021, 06:41 PM
Replies: 28
Views: 1,486
Posted By JOHN COOKSON
The new packing is settling in. You will need to...

The new packing is settling in. You will need to continue to adjust the packing nut until it is "broken in" all the way.
I used to approach packing by adjusting the nut until I get the drip rate I...
Forum: Cooling System 09-07-2021, 02:16 PM
Replies: 28
Views: 1,486
Posted By JOHN COOKSON
Venting the area around the engine will help...

Venting the area around the engine will help dissipate the heat that is generated.
The running temperature of the engine is determined by the engin's (correctly working) cooling system not the...
Forum: Troubleshooting 09-07-2021, 12:56 PM
Replies: 8
Views: 6,179
Posted By JOHN COOKSON
Call Ken at MMI and ask him these questions. ...

Call Ken at MMI and ask him these questions.
Fuel should not be pooling in the carburetor throat.
Keep the valve(s) between the tank and the engine turned off except when the engine is being used....
Forum: General Interest 09-05-2021, 11:52 PM
Replies: 4
Views: 581
Posted By JOHN COOKSON
1. Remove the thermostat and put a valve on the...

1. Remove the thermostat and put a valve on the bypass. Closing the valve will direct 100% of the pump output through the engine.
2. Try an acid flush. Even though you boat on a lake (as I recall)...
Forum: General Interest 09-04-2021, 02:21 AM
Replies: 4
Views: 581
Posted By JOHN COOKSON
I had the same experience with the MMI pump. I...

I had the same experience with the MMI pump.
I ditched the tired Oberdorfer because it wouldn't stop leaking no matter what I did.
After I installed the MMI pump my running temp at cruise RPM...
Showing results 1 to 25 of 500

 
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