Riddickulous
Cadet
- Joined
- Nov 20, 2011
- Messages
- 6
I have an '08 Optimax 115 and had some very odd water/overheating issues yesterday. I'm cruising up the Bogue sound at 5100 rpm, sound temperature is 58 degrees and I flipped through the SmartCraft and made a comment to my buddy that it was amazing to me that an engine could run at 93 degrees and that there must be a ton of flow going through it. Not 5 minutes later an alarm goes off, I quickly scroll through and see it is at the 160 degree point of the alarm and before cutting it I happen to glance back and notice a fairly decent flow out the pee hole.
We sit long enough for it to cool down to about 130, crank it and get a reasonable stream and it seems to be cooling down a little initially. We get underway and I was only able to do about 2000 rpm with the temperature going back and forth between 140-150 (thermostat opens at 145 I believe). I tried to give it more throttle and it pretty quickly jumped above 150, pulling back on the throttle brought it down. Pressure as indicated by the SmartCraft was about 11psi at around 2000 rpm and the stream seemed to be the same as its been all summer (just got the boat in May). We get a few miles down the sound at this near troll speed and the temp shot up to 160. I'm not sure if I had flow at this point as I was poking around on my phone looking for what the water pressure should normally be. I let it cool again for a bit and this time no flow out the hole but seemed like I could see vapor/exhaust coming out.
After a tow back to the dock and back to the house I hook up the garden hose and water flows out the pee hole and I hear a couple of clicks as if something was opening or closing. Let it run for 10-15 minutes and I crank it up and after cranking it the flow out the pee hole immediately beings to slow as if the passage is going closed and finally it stops. Motor has 206 hrs on it (20 by me this summer) and likely has never had the impeller changed.
I talked to some guys at work and two of them independently said the driveshaft could be spinning in the impeller and this would cause the intermittent issues. Any other ideas?
We sit long enough for it to cool down to about 130, crank it and get a reasonable stream and it seems to be cooling down a little initially. We get underway and I was only able to do about 2000 rpm with the temperature going back and forth between 140-150 (thermostat opens at 145 I believe). I tried to give it more throttle and it pretty quickly jumped above 150, pulling back on the throttle brought it down. Pressure as indicated by the SmartCraft was about 11psi at around 2000 rpm and the stream seemed to be the same as its been all summer (just got the boat in May). We get a few miles down the sound at this near troll speed and the temp shot up to 160. I'm not sure if I had flow at this point as I was poking around on my phone looking for what the water pressure should normally be. I let it cool again for a bit and this time no flow out the hole but seemed like I could see vapor/exhaust coming out.
After a tow back to the dock and back to the house I hook up the garden hose and water flows out the pee hole and I hear a couple of clicks as if something was opening or closing. Let it run for 10-15 minutes and I crank it up and after cranking it the flow out the pee hole immediately beings to slow as if the passage is going closed and finally it stops. Motor has 206 hrs on it (20 by me this summer) and likely has never had the impeller changed.
I talked to some guys at work and two of them independently said the driveshaft could be spinning in the impeller and this would cause the intermittent issues. Any other ideas?