Tried to start my 2003 5.0 Mercruiser sterndrive today to winterize the engine. Initially the starting system acted normally as the engine turned over and almost started but didn't quite catch several times (boat has been sitting idle for over a month). Then when I tried the ignition switch...
Thanks for the multiple areas to investigate - am checking as time allows. I checked the bellows visually and could not find any cracks - new in appearance. Using garden hose in the driveway, I couldn't get any water to penetrate inside the hull where I observed the leak previously. The slow...
Thanks for the responses - understand what you are advising here. I already replaced the ECT sensor (part #805218) on October 4th and driveway tested it with no problems. I mentioned this in my post on October 5th but can see how it got overlooked with how I worded it and my focus on the...
The part number used is 806490T - I verified this number with the local mercruiser dealer and he verified it was the correct one by cross referencing with the engine serial number. Since then I reinstalled the original sensor switch (single wire) and retested in the driveway. The temperature...
Update: Yesterday (in driveway) I changed out the ECT sensor and functions stayed same as before with dash Faria temperature gauge starting at 0 degrees and climbed to 175 degrees at idle after warming up. Today (in driveway) I changed out the ECT sensor switch (used Quicksilver replacement...
Thanks for the replies. As recommended, I will inspect the shift cable bellows with the drive raised. Think I need to focus on current thoughts/status. I have owned the boat for 5 years now and used the same marine mechanic during this time. During these years, the boat has rarely been in the...
In fall 2022, I had a full service done on my Alpha 1 sterndrive including replacing the gimbal bearing, new bellows and a new water pump assembly in the lower unit by local marine mechanic. Due to health reasons, i did not use the boat until summer of 2023. There is now a slow water leak coming...
Thanks to all for input - current status update. Per guidance from Alldodge, I disconnected all three items. Was able to identify that the engine coolant temperature switch was causing the beeping. Am planning on replacing the sensor switch when replacement part arrives. Will advise if problem...
I have a 2003 Bayliner I/O with Mercruiser 5.0 with thunderbolt V ignition control module and electronic fuel pump and Alpha One stern drive - also has partial closed water cooling system. The audio system alarm currently goes off (continuous horn) when I hit 3000rpm or more while under way -...
My son recently bought a 2008 Hewescraft packaged with 2008 75hp and 8hp Honda EFI outboards from original owner. Son put fuel stabilizer in tank upon purchase when filling tank. Main has about 150 hours on it. Main works great at up to 4000+rpm for about 15 minutes then starts to sputter and...
Thanks to all for the input on solving my boat problem. After checking on the suggestions along with rechecking wiring connections, switches and fuses with no success, I decided to remove and check the slave solenoid. The solenoid tested okay but in reinstalling the solenoid, I thoroughly...
Thanks for suggesting the neutral safety switch - I forgot to mention that in my last post - it was in the on position while trying to start the engine.
Thanks Chris for the info. I went ahead and tested the oil pressure switch and sender - switch defective but sender seemed okay - decided to replace them both. Having accomplished that today, in trying to start the boat, there is no power getting to the starter or solenoid when activating the...
I have a 2003 Bayliner I/O with Mercruiser 5.0 with thunderbolt V ignition control module and electronic fuel pump - not fuel injected. After third day on water in remote location, fuel pump would not run with ignition and kill switch on. Local mechanic helped confirm fuel pump was working but...
