Search:

I figured I might as well replace the thermostats since I had replaced everything else. They looked fine, and there was no debris or blockages behind them. Well, that ended up solving the problem....

It is not overheat. It says "overtemp" when I go to the alarm screen it says check water inlet holes and that water pump may be bad.

Got back to the boat today. Changed the water pump. Overtemp alarm still goes off after about 1.5-2 minutes at anything over 900 rpms. I checked the temps of both compressors with an infrared temp...

Pulled the poppet. No debris, spring looked and moved good. Pulled the lower unit and inspected the water pump. The impeller looked perfect. I'm going to replace it anyway since it is off, as well as...

300xs 1E003178

Coming home running 12 miles at about 4100 rpms, I get an overtemp alarm for my port engine about 1/4 mile from the no-wake zone. I constantly monitor water pressure and temp on my...

Checked the pressures again, you are correct Don. Fuel pressure does drop after shut down, but much slower. Fuel pressure about 104-105 at idle, 90 15 seconds after shutdown, 75 at 30 seconds, and 50...

250 xs 0T998486

Twin engine center console. The engine has a rough idle, but seems to be making power other than lagging behind the other engine about 200 RPMs at WOT. I tested the fuel and air...

My vessel view sun cover from 2007 is toast. It looks like they don't make them any more. Anyone have ideas for a replacement sun cover? This is the unit I have>

Weill, I finally figured it out. I was about to pull the rails and injectors, but I decided to do some more investigating using the timing light. I had my son run the boat idling around while I was...

Anyone have any ideas?

Swapped PCMs, no change. I'll add that the issue is evolving. Instead of an intermittent RPM drop, the port engine is now almost always 200- 400 rpms lower than the starboard at cruising speeds and...

Would swapping PCMs be worth a try?

Well I still have the same issue. I also borrowed a snap on timing light and all cylinders are firing. I am not sure what to look into next. Anyone have any ideas?

Update. I put a new tracker valve in yesterday. No visible damage that I could see. The fuel pressure now stays steady after shutdown. It also seemed to idle smoother. I am going to try and take it...

So this intermittent issue is happening more often. Pretty much every time I go out, and it also appears to be happening at lower RPMs as well as WOT. Still thinking it was a coil issue i started by...

Forgot to update this. I got a new set of spark plug wires, and knock on wood, it has been running well.

So I have checked everything mentioned here. No apparent coil failures, engine ran fine last weekend. I actually just replaced the coil harness about 6 months ago with the newer style. There are no...

Thanks guys. It was one of the 20 amp fuses. Any idea why it would have blown?

Thanks for the replies. Is the main power relay #5 in the electrical plate components diagram? Where is the fuse I should check?

2007 300xs SN:1E003178

I have a center console with twin 300 optimax and vessel view. Saturday, when running in at 35 mph, the starboard engine just shut off and the vessel view went dark. The...

Thanks Don.

How would I perform a spark test while underway?

300xs 1E003189

I am having a hard time figuring out exactly what is going on and have been chasing this issue for quite some time. I have a center console with twin 300xs. The port engine idles...

2007 300 xs 1E003178

I have twin 300 optis on my center console. One of the engines had three coils go bad, where they would drop out intermittently and then come back. After replacing three, I...

I have, numerous times. I think I have replaced three of them. I'm not sure why they go bad. I have twins and it has happened on both engines. If it doesn't stop after shifting, and you don't want to...