2014 AR210 overheats in-use AND also when flushing

[WREKS]

@Waterman1957 If there is some loose sediment in cooling water passages, you might be able to flush it out by running above medium rpms for a few minutes. If doing that stops it from overheating, I would make it a habit of running the engines from time to time, for about a minute, without hose water, to dry out the cooling system. My worst overheating problems developed while my boat was not being used and the residual water left in the cooling system from flushing led to a fast growing microbial buildup that clogged the cylinder water jackets.

 

[Waterman1957]

@Waterman1957 If there is some loose sediment in cooling water passages, you might be able to flush it out by running above medium rpms for a few minutes. If doing that stops it from overheating, I would make it a habit of running the engines from time to time, for about a minute, without hose water, to dry out the cooling system. My worst overheating problems developed while my boat was not being used and the residual water left in the cooling system from flushing led to a fast growing microbial buildup that clogged the cylinder water jackets.

Amazing! I just pulled thermostats and that's exactly what's going on,!! Block not getting proper flush from owner,I love being marine mechanic!! Lolol!

 

[Waterman1957]

Amazing! I just pulled thermostats and that's exactly what's going on,!! Block not getting proper flush from owner,I love being marine mechanic!! Lolol!

Stuff is slimy greasy,and leaves a plastic like film you can peel off thermo housing!crazy!

 

[WREKS]

@Waterman1957 Exactly!

 

[WREKS]

@Waterman1957 That is why I dry run the engines from time to time while the boat is not in use. No water, no microbial buildup.

 

[Waterman1957]

@Waterman1957 That is why I dry run the engines from time to time while the boat is not in use. No water, no microbial buildup.

Yup,I'll keep you posted,I'm gonna do a flush that should remove this growth,to bad no block drains!!

 

[WREKS]

If it has built up in cylinder water jackets, it will not flush out. I have removed the heads on both engines three times after attempting to flush them.That's why I suggested taking it out and running at medium rpms for several minutes. Hopefully, you may not even have an internal blockage. Thanks for posting. BTW, the block does drain through the hose coming from the bottom of Cylinder #4. Problem is, it still stays very wet in the cylinder water jackets. That is why I periodically dry run the engines for about a minute each. I have not had any overheating since I began doing this.

 

[Waterman1957]

If it has built up in cylinder water jackets, it will not flush out. I have removed the heads on both engines three times after attempting to flush them.That's why I suggested taking it out and running at medium rpms for several minutes. Hopefully, you may not even have an internal blockage. Thanks for posting. BTW, the block does drain through the hose coming from the bottom of Cylinder #4. Problem is, it still stays very wet in the cylinder water jackets. That is why I periodically dry run the engines for about a minute each. I have not had any overheating since I began doing this.

Since it is getting stuck at the thermostat,and attaching to it ,I'll run it a few times and see if I can get it all out,problem is once it has begun to form it sounds like it's gonna keep growing and so on till the boat gets used more and properly drained and dried

 

[Waterman1957]

I actually pulled the thermostats,put in only the restricted plates with rubber seals and am going to run it for a few days on and off to see if it gets any better,I have the yds and got it working finally after a few programming glitches,so I can see if I'm getting anywhere before tearing off heads,

 

[WREKS]

@Waterman1957 I agree. You, definitely, do not want to remove the head if it is not necessary. That can present new challenges and obstacles. I knew I had an overheating problem by Cylinder #1 by taking infra red readings in excess of the temp sensor specifications. Flushing did not help so I felt I had no choice.

 

[Waterman1957]

I'll do some infrared temps again to see what's up and see if yds agrees change in temperature and block is lowering and time of sensors going off,yesterday I got alot farther down river before alarms went off,hope I'm going right direction!! Lol

 

[WREKS]

Is yours the 1100 or 1800?

 

[Waterman1957]

It's a 2015 AR210

 

[Waterman1957]

It's a 2015 AR210

 

[WREKS]

Reason I ask is there is a 1100 and 1800. Both are AR 210. 1100 has starter on the starboard side. 1800 has starter on port side. Which do you have?

 

[Waterman1957]

Starter on starboard side both engines,under exhaust manifold

 

[Waterman1957]

Storms today,can't seatrial

 

[WREKS]

If you have had success running on the water, sea trials at higher rpms are the way I would try to clear the water jackets. Hopefully, you can flush them clean. Even going a little farther is positive.

 

[Waterman1957]

Yup on same track,shoot for tomorrow,will be in touch with this

 

[Waterman1957]

Took a hose a ND flushed from thermo intake hose to intake coming from jet,finding no sand or dirt , perfectly clean,nothing at all contaminating ,I'm still looking,looks as though raw water drains back from block to jet to drain block,was no water when I disconnected it