For the couple hunder bucks extra I'd go with the full system. Your will save replacing the manifolds and risers every few years, plus the piece of mind.

www.perfprotech.com
www.mrcool.us

Thanks CIG3,

Im going with the Perf. full system. I like the videos and clear instructions to install on the website. And they are a couple hundred less than Mr. Cool.

I do have one question. Before filling the new system with fresh fluid how Do I flush my engine? Do I need to flush it with the fluid that will be in the closed system or can I just do a fresh water flush like I normally do on the engines after use in the salt water?

I plan to do this install with the boat in the slip on the Hydro Hoist. If you think this is a bad idea please let me know.

Thanks Again

I would drain the block and manifolds first. Then fill the system with a calcium disolving solution loke CLR and let is sit for a few hours. Then flush with fresh water and drain again. You are now ready for your install.

While your at it like a previous post stated, I would add the shut off valve with a "T" with a hose adapter to be able to flust the heat exchanger after a run.

Good Idea.

Sorry if these questions are stupid. But I have no engine experience at all.

As far as draining the engine, Where is the plug to do this and can I even access it with the motors still in the boat?

Cliff MB can you post the drawings for the valve?

airshares,

as requested here is the diagram for the flushing of the heat exhanger.

Attached jpeg

Thanks Cliff!

I have what I THINK is a "half system" I boat in fresh water only, but, its muddy/weedy in spots (including near my dock where boat sits and idles) is there any benefit to "Flushing" a fresh water system? If so, what do recommend for flushing? Also, how do I do it?

Thanks!
Michael

I assume you have a Bravo drive. All you do get yourself a set of Muffs for engine flushing. Clamp them over the water pick ups on the drive and connect a hose to it. Turn on the water and start the engines. Let them run for about 5 minutes to flush the motor.
In salt water I use to taste test the water coming out of the exhaust and if it wasn't salty I knew it was probably good. Being that you are already in fresh water I would just let it run for about 4-5 minutes. Then shut it down turn off water and youre done.