Me too. But the type you’re talking about doesn’t help solve that problem lolI like motorboating.
Stop in for a cup of coffee
- Thread starter toolmanmike
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Mattax
Just the facts, ma'am
nah. Stuff that requires minimal attention.
Ddaddy
Just doing what I do
The carbs need to be rebuilt first an foremost to get the engine running in normal heat balance. The overheating bit follows. That part is most likely the fresh water heat exchange pump and plumbing.
Awesome thanks! Think putting a spacer between the carb and intake will help the heat soak any? I have plenty of clearance to do such
A closed system? It has a radiator? You sure? Rare to have. Most use lake or ocean water to cool.....
Like this
78094 Mercruiser Heat Exchanger.
Yep, surprised me too. Water is sucked in down by the prop, passes thru a pair water to water radiators, one on each side of the rear of the boat, then passing into the exhaust manifold, back out into the water. Each radiator is full of antifreeze and that flows to the water pump and into the engine. Lake water itself never enters the engine
Ddaddy
Just doing what I do
No, just get the system operating as designed. It worked fine then and will now if you get it properly restored to the condition it was designed to operate in.
If i recall it has a heat exchanger.
Screens in it. They get sanded up and no more cooling water.
BUT you need lake water to cool the engine water. Water to water cooler. no lake water, no cooling.
The lower unit has a pump, impeller if you want to get technical. Then it passed up a tube where its distributed through the heat exchangers. There should be a telltale that water is flowing, like the outboards have.
Is there a way to test this on land? I thought about sticking the prop into a 55 gallon drum filled with water
Correct.
Just got in the house a little while ago. Long day in the shop.
Not very often im out working until 8:30.
Trailer is getting there...
Then pulled the dodge in the shop, and got a confusing issue with wiring diagram figured out.
Not very often im out working until 8:30.
Then pulled the dodge in the shop, and got a confusing issue with wiring diagram figured out.
Ddaddy
Just doing what I do
So then, back flush the fresh water cooling system as a first step to blow out any contamination cloging it. Then repeat.
We run outboards on land all the time. Usually a garbage can.
The perfeshunals use a heating oil tank cut to fit the motor in.
Awesome thanks
Look at this^^^^^Chris
Thanks tim!
Will work depending where water intake is.
Down on the prop
Center of the prop is the exhaust.
That doesent really test the impeller. It forces water up through the exchangers.
Buddy has a jet boat, water to water exchanger too. And it had screens that need to be removed and cleaned.
Yep. But this also has a pair of flex tubes that run down to the prop as well. I guess they could be the water return. I’ll have to double check
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