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Yeah that should be covered by standard boat insurance if it can be determined that it was lightening, not an electrical law that caused the damage. Just a quick tip future electrical problems, especially if thy are intermittent, get a small bottle of "Stabilant 22A" Use it on all connector...

Those tachs can easily be calibrated. Get a good digital Timing light that also reads engine RPM. Connect the timing light to the cylinder #1 Spark Plug wire and start the engine. See if the tach and timing light agree. If not, believe the timing light and adjust the tach to match what the...

Does anyone know if the Water Temp gauges on most Sea Rays can be calibrated to the senders? Some of the replacement senders do not have the same resistance curve of the originals, so I am wondering if there is an adjustment on the rear of the gauge itself.

Virtually all Alternators also have Regulators either internal or external. Alternators put out AC Voltage, not DC. There is a 3 Diode array called a Triode either in the Alternator itself or in The Regulator that clips a half wave to convert the voltage to DC. Then the Regulator regulates the...

Figured it out I was able to figure out what was wrong and repair it today. It was not the power valve, I bought one just in case I needed it, but they don’t cost much. When I got the Primary Float bowl off, I could immediately see that one of the two primary jets was contaminated with some...

I had thought about fuel pressure, or filter, etc, but then it would run worse as I tried to run it at higher RPM or under load where it would need a higher fuel flow. Instead, it runs fine at higher RPM right up to WOT. Its only in that one RPM range from around 1400 to 2000 RPM on the...

Thanks. That's what a couple Hot Rod buddies of mine said they thought as well. I think I'll swap it out this weekend as I have a complete Rebuild kit with a new one anyway. I thought of swapping them between engines, but it seems so likely to be the carb, that I guess I'll just pull it apart...

That depends on the boat configuration. My Gen set and exhaust are brand new and don't leak. But CO comes back over the transom from the exhaust from both the engines and the generator, and migrates into the rear area of the bilge where the generator is located. The Kohler manual says to leave...

Yes, it has vacuum secondary's. As I mentioned in the OP, I had thought that they might be flopping open too soon and causing the engine to die from way too much air at that low throttle setting, so I rigged a camera to watch them as I moved the throttle while running. They weren't opening (as...

I thought of the Accel pump, but that would not come into play at a very slow rate of advancing the throttle, and it would come into play if I advanced it quickly from 3000 to 4000 RPM, where it shows no problem.

With my 300DA, Marine Power Crate motors, 350, 310HP Carb models, 70 hours on both engines and new Holly 4150 Carbs, the Port Engine suddenly developed a problem that I am pretty certain traces to the Carb. It starts and idles fine, choke works well and comes off properly as it warms up. All...

The Kohler 5E also has a CO sensor. If there is enough CO building up in the engine room, then it will shut itself down automatically. The 5E throws error codes when it shuts itself down. Have you checked the error code before clearing it? I had that happen on my 300DA when running both...

I had the same problem when I bought my 300DA. Port fuel gauge would read erratically, and sometimes not at all. I went through all the basic tests, tried cross wiring to the gauge to make sure the problem followed the sender, etc. Replaced the sender, checked the grounds, used a Resistor...

That a good point that I hadn't considered. They almost had to have pre-drilled through that fiberglass in order to get those screws to penetrate all the way through a hull.

It definitely could be the Solenoid. I always replace those when I replace a starter, but not everyone does. They are not vey expensive, so its a good idea to replace them with a starter. As mentioned, be really sure about fuel vapor first. It is going to spark a lot. Turn on the ignition...

I'm on my first boat, and as a licensed aircraft mechanic, I am just shocked at the poor quality of repairs I see on my own 300DA. Since marine mechanics don't need any license, some of them also don't seem to care or know what they are doing. I'm with the other posters that you have to...

Your theory might be correct. The fuel pump should not be constantly running with the ignition on an engine stopped. A carb should not just allow fuel to dump into the manifold and cylinders anyway, because the float valve should close when the float level is reached. But that does not mean...

I know that it is an Airmar B744VL Transducer with Speed wheel and temp, and with a Raymarine 7 Pin connector. Its directly compatible with the Raymarine E7D, E90 & E120 series. I'm trying to figure out which other brand MFD's it can be used with, such as Garmin or Lawrence. I'm trying not to...

Thank you! Sorry for the very late reply.

On my '94 DA 300, I have the factory installed Transducer, which is a Brass, Through Hull 50 / 200 Transducer, which has an external fairing, and currently is attached to a DSM250 Sounder and then to a old RL70C Display. All works fine, but I'd like to replace that old RL70C with something a...