Overheating problem - Flushing Heat Exchanger 

Wish these was more marine maintenance videos like this

Most seemingly "good" techs will miss that because they are just too lazy or in too big of a hurry due to work load. Nobody takes care of your own interest like you ! Good job !

I don't know what career you retired from, but you are adapting well to being a boat owner/ mechanic. 😅 I hope you have rectified the heating problem and get many more yrs of enjoyment from that beautiful boat!

Two thumbs up Captain! One for the overall video. Well done! And second for the quick circles showing which bolts you wrenched on. Cool stuff, appreciate the videos.

I’ve used a cider barrel with a flush pump added with a way to back flush and different adapters to do small and large engines. Barnacle Buster is my go to.

So I've not commented before, but I am so grateful for your channel and all the posts!! My 2007 Gas powered Horizon 6.2 MPI 341 is docked on Lake Lanier in Georgia. Oddly enough, 1 of 3 on the same dock! I have replaced both impellers (with your channels help). My port engine is perfect, but starboard is having a PSI issue. Reads about half the PSI of the port engine. Engine temp is right at 160 on both up to about 3200 rpm, then starboard begins to rise and at 4000 rpm and I get an alarm on starboard. I've actually switched the PSI gauges and ruled that out. I had thought maybe I have a blockage at the cool fuel assembly, but very difficult to access on starboard. I'm gonna try flushing the tranny heat exchange now and see what that does. Again, what you post is wonderful and I believe I can speak for 341 owners everywhere: THANK YOU!

A short piece of threaded rod slightly smaller than the heat exchanger tubes works well to clean any calcium buildup which is usually what ends up causing the overheat in second place behind impellers and thermostats.

I’ve back flushed allot of engines and found some really weird stuff. Anodes , impeller parts , nuts and bolts and things you really couldn’t explain

I know I’m late to the party, but I had same issue this week. Tracked it down to internally leaking heat exchange. Coolant was going right out exhaust with the raw water. Confirmed that once I removed the side cap to the heat exchanger where I discovered the orange coolant leaking from a few of the cooling tubes. Break out another thousand.

The through hulls always make me nervous when away from the boat. Never know if those Bilge 😅pumps will absolutely keep up

Just had to track down a nover heat issue. Went through every hose, cooler and had the HX prof cleaned. Raw water pump was rebuilt, impeller replaced and found the wear plate and cam on this pump was worn so much; at high rpm cavitation occurred and cooling water was too saturated with air bubbles to effectively cool things down. All set now.

Merci beaucoup ❤❤❤❤❤❤❤

Thanks man

Bro, water temps are at an all-time high in Florida this summer and you're sucking in 90 degree water - maybe warmer - so it just doesn't have the cooling capacity it once had. You might have to find a rpm that keeps thing from getting too hot.

Hello Captain. What did you do for a living before retiring and managing all of these technical challenges of owning a large boat? Impressed with how you deal with all of the fun problems. Enjoy all of your videos.

Great video. Curious what you used to flush the transmission cooler tube?

your tranny cooler is the same size as my diesel cooler lol

Can we get the Admiral down in the engine room. in the bowels of the vessel to maybe wipe your sweaty forehead, bring you cold water?