Where is the coolant drain on 3.7 litre Mercruiser?

[ba_50]

I looked on both sides and found nothing. Is a 3.7 a 140hp motor? Thanks.

 

[Don S]

Re: Where is the coolant drain on 3.7 litre Mercruiser?

I looked on both sides and found nothing. Is a 3.7 a 140hp motor? Thanks.

Is this a 3.7 (aka 470) or a 140 (3.0L Chevy engine)? Big difference.

 

[Big Boat Bay Buster]

Re: Where is the coolant drain on 3.7 litre Mercruiser?

I use a large size coffee can or a small bucket, placed right under the spot where the hose goes from the intake manifold to the water pump. Disconnet hose from WP, should catch 99% of the coolant. Should take about 3+ fills of the bucket and drain most of the coolant from the engine. Quick, easy drain.
Chris

 

[Don S]

Re: Where is the coolant drain on 3.7 litre Mercruiser?

I use a large size coffee can or a small bucket, placed right under the spot where the hose goes from the intake manifold to the water pump. Disconnet hose from WP, should catch 99% of the coolant. Should take about 3+ fills of the bucket and drain most of the coolant from the engine. Quick, easy drain.
Chris

And just how do you know which engine he has, or does he know which engine you have

 

[Big Boat Bay Buster]

Re: Where is the coolant drain on 3.7 litre Mercruiser?

Its obvious to me
He has a 470/ 3.7L
I have a 470/ 3.7L


Don S.---- You are the Simon Cowell of I-Boats -----

 

[Don S]

Re: Where is the coolant drain on 3.7 litre Mercruiser?

Is a 3.7 a 140hp motor?

How can you say it's obvious with that discription? A 140 is a 3.0L

 

[ba_50]

Re: Where is the coolant drain on 3.7 litre Mercruiser?

The only ID on it is Mercruiser 3.7 Litre and a serial number. I looked in 3 manuals and can't find any way to identify so far. Maybe one of you can tell me what to look for.

I think it has 165 hp now.

 

[JustJason]

Re: Where is the coolant drain on 3.7 litre Mercruiser?

look at that... 25 free horsepower.... that never happens