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IslandExplorer replied to the thread Crank driven vs block mounted raw water pump pros/cons.

New crank driven F6B9 raw water pump just arrived. 👍
May 12, 2025
IslandExplorer replied to the thread Crank driven vs block mounted raw water pump pros/cons.

Wow, thanks for the awesome detailed writeup on how to set this up, I really appreciate it. I can picture what your saying here. I am...

May 12, 2025
IslandExplorer reacted to ROY WILLIAMS's post in the thread Crank driven vs block mounted raw water pump pros/cons with Like.

MERCRUISER ENGINE 302CU. DISTILLED WATER 50% ANTIFREEZE 50% ENGINE COOLANT heat exchanger. THE WATER OF THE DRIVE SHAFT PUMP PARTS...

May 12, 2025
IslandExplorer reacted to Scott Danforth's post in the thread Crank driven vs block mounted raw water pump pros/cons with Like.

The F6 is more than enough. It's for big blocks The F5 pump is more than enough A full system will require a 5" diameter heat...

May 12, 2025
IslandExplorer replied to the thread Crank driven vs block mounted raw water pump pros/cons.

Experience is definitely a big plus. That capacity ratio is just what I needed to know, thanks! Definitely don't want an udersized exp...

May 8, 2025
IslandExplorer reacted to Scott Danforth's post in the thread Crank driven vs block mounted raw water pump pros/cons with Like.

must have done a few hundred heat exchanger setups in my prior life. you need to make sure the expansion tank is about 20% of the total...

May 8, 2025
IslandExplorer replied to the thread Crank driven vs block mounted raw water pump pros/cons.

Haven't decided where to mount it yet but good to know that on the wall is a good option. I do prefer keeping the motor as uncluttered...

May 8, 2025
IslandExplorer reacted to alldodge's post in the thread Crank driven vs block mounted raw water pump pros/cons with Like.

Don't have a pic but my friends is mounted to the bulkhead away from the motor

May 8, 2025
IslandExplorer replied to the thread Crank driven vs block mounted raw water pump pros/cons.

Anyone here plumb in a separate expansion tank before? My heat exchanger is very simple and does not have one built in. Prob have to...

May 5, 2025
IslandExplorer replied to the thread Crank driven vs block mounted raw water pump pros/cons.

This shows the space I'm working with. The area in front of it is an empty cargo hold.
May 5, 2025
IslandExplorer replied to the thread Crank driven vs block mounted raw water pump pros/cons.

Awesome, thanks for the input all, and the flow diagram. The pump rotation being compatible either way is nice, I think I will order one...

May 5, 2025
IslandExplorer reacted to ROY WILLIAMS's post in the thread Crank driven vs block mounted raw water pump pros/cons with Like.

MERCRUISER MODELS 225II-TR STANDARD COOLING. ENGINE MCM302 CU IN. 1970'S. DWELL 26-31. OIL ENGINE 6 QUARTS. 5.7L V8 IDLE 550-600 RPM...

May 5, 2025
IslandExplorer reacted to Scott Danforth's post in the thread Crank driven vs block mounted raw water pump pros/cons with Like.

Volvo uses an anti-rotation bracket

May 5, 2025
IslandExplorer reacted to alldodge's post in the thread Crank driven vs block mounted raw water pump pros/cons with Like.

Designed for left and right hand rotation You have LH so front of motor rotates clockwise when facing it. Intake right side of your pic

May 5, 2025
IslandExplorer replied to the thread Crank driven vs block mounted raw water pump pros/cons.

Kind of lost trying to figure raw water pump output needed for it. I was looking at a Johnson F6B-9.
May 4, 2025

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