Mercruiser 165 6cyl inline dies when boat is in the water

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cyclops222

Commander
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Mar 21, 2024
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New sudden problem ?
Have you tried adjusting idle speed and idle mixture screws ?
 
Scott Danforth

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
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51,092
YOBE said:
Don't want to keep spending money on this.
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Fuel and Insurance are the cheapest part of boating hobby.

maintenance, repair and upkeep rival owning a plane, race car or horses.
 
C

cyclops222

Commander
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Mar 21, 2024
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Wife and me have budgets.
Boat has no limits to keep running and safe. :)
Nether of us can walk to shore.
 
Y

YOBE

Seaman
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Mar 12, 2019
Messages
70
Scott06 said:
you picked the wrong hobby….

make sure the flapper didn’t break of and is down in the exhaust oath blocking it they can work their way down to the drive
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Oeps…. That’s a scenario i didnt think yet of.
When I removed the stern I installed a new exhaust rubber. Didn’t see anything abnormal then. But will see what I can find

I know about the costs but I’m just starting to doubt if The engine is worth it.😒
 
Y

YOBE

Seaman
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Mar 12, 2019
Messages
70
Bought a simple borescope. Hopefully will learn me something more about inside of the cylinders.
 
C

cyclops222

Commander
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Mar 21, 2024
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It can be use in other passages also. Like removing the thermostat and looking in as far as possible.
 
Scott06

Scott06

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Apr 20, 2014
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YOBE said:
Oeps…. That’s a scenario i didnt think yet of.
When I removed the stern I installed a new exhaust rubber. Didn’t see anything abnormal then. But will see what I can find

I know about the costs but I’m just starting to doubt if The engine is worth it.😒
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Always the concern/choice/ decision With an older boat. Best thing if you like the boat repower with a more recent vintage tear out bobtail.

have same issue with our 2004 jetski, lots of hours been easy on wallet but it’s up there in years. This winter the seals on crankshaft that seal oil chamber for rotary intake valve shaft leaked enough 2 stroke into engine that it hydrolocked this spring…when not in use i put a clamp on the oil line , not worth pulling the engine to replace these seals
 
K

kd4pbs

Petty Officer 3rd Class
Joined
Mar 5, 2012
Messages
78
The nice thing about an inline six is their smoothness. Anything else commonly available in a boat will vibrate more. That engine can be modified to make quite a few ponies if one so chooses.
 
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