Engine Issues - Need some expertise please..

[Katemma Life]

We ran the OD's onto a sandbar at night time. Tried to get off with out sucking sand into the engines but no luck. So we powered off the sandbar. High temp alarms came on - shut off the engines immediately. Waited a while, turned back on and finished powering off and limped home.

So, the blocks are full of sand. Tstats are clogged.

I am having the boat brought out of the water to my driveway - my question is this; how do I EFFECTIVELY go about washing all of the sand out of the blocks?

Also, am I thinking of driving the boat a short distance at low RPM to the loading ramp and was planning to just remove the Tstats for that... ok?

Anyway, if anyone knows an effective process to flush these blocks thoroughly I would really appreciate hearing it.

Thanks

 

[scoflaw]

Open the 2 block drains and flush from the top. They're just above the oil pan at about the middle of the block

 

[Katemma Life]

flush through the tstat holes? will that effectively get it all out? I got some sand in the blocks before and not getting ALL of it just junks up the Tstats over and over again... just asking? thank you

 

[scoflaw]

Yes and it won't be easy to get it all, sand can hide behind the cylinders toward center of block. I'd run a few trips with no stat

 

[mrsrobinson]

The engines are raw water cooled?

 

[Katemma Life]

yes raw water cooled

 

[Katemma Life]

is running them with no tstats safe for the engines? dont the tstats provide some back pressure for the cooling water system?

 

[mrsrobinson]

is running them with no tstats safe for the engines? dont the tstats provide some back pressure for the cooling water system?

I am no expert, but in my teens we did this with our cars with no issues.

 

[scoflaw]

No nothing to do with backpressure. It will just run cooler.

 

[Katemma Life]

you guys think I could just remove the Tstats and run the thing clean without removing it at all?

 

[Katemma Life]

wondering if the raw water pumps are ruined too now..

 

[scoflaw]

You probably want to pull some hoses and see how bad things look. The CF3 has small lines

 

[Pirate Lady]

wondering if the raw water pumps are ruined too now..

ran into shallow mud at idle speed 2 summers ago, wind caught me in tight quarters, not much i could do. Mechanic shop flushed the block AND replaced the raw water impeller. Do that.

 

[Pirate Lady]

I am no expert, but in my teens we did this with our cars with no issues.

Things were different back then...

 

[Woody]

Things were different back then...
View attachment 129583

Ya that was back in the days when they used spring water in the winter so they wouldn't freeze up overnight.

 

[Katemma Life]

guys - some feedback. Everything worked fine. Backflushed, then ran without tstat. All clear for 7/4
thank you for all of your support