90hp Suzuki shuts down at idle

M

mdoug

New member
Joined
May 9, 2006
Messages
53
Reaction score
0
C Dory Year
2005
C Dory Model
22 Cruiser
Vessel Name
Mikey
My 90hp Suzuki is shutting down when idling after we run it to the marina from Bear Island. Makes docking a challenge. Marina mechanic can't seem to fix the problem. Also, he reports gas in oil. This is a 2005 model with many hours.

Anyone have a clue?
 
Carbed or fuel injected?
 
If its not the low idle adjustment then may be a leak in the auto choke vacuum line? Just guessing but that is where I would start.
 
mdoug,

I hope you're not experiencing the infamous Suzuki corrosion problems experienced by many Suzuki motor owners of that vintage. That's one of the symptoms.

Has your boat been moored in the water or dry stored? Check out this thread:

Suzuki Corrosion
 
starcrafttom":5p9lqbt9 said:
If its not the low idle adjustment then may be a leak in the auto choke vacuum line? Just guessing but that is where I would start.
Click to expand...

Thanks!
 
Jazzmanic":2aa57u66 said:
mdoug,

I hope you're not experiencing the infamous Suzuki corrosion problems experienced by many Suzuki motor owners of that vintage. That's one of the symptoms.

Has your boat been moored in the water or dry stored? Check out this thread:

Suzuki Corrosion
Click to expand...

Nope
 
Lots of bad reports online about this vintage suzy. My mechanic is baffled. I plan to buy a new engine.
 
If 1 of the fuel pumps is driven by the camshaft, a ruptured diaphragm can leak fuel into the crankcase via the valve train area. That could explain the gas in the oil.
 
Idle speed is controlled by the IAC (Idle Air Control). It is electronic and must be diagnosed by plugging the motor into a computer w/ SDS(Suzuki Diagnostic Software). Are you getting any trouble codes?
If its leaking exhaust from corrosion, you should get 1 or more trouble codes from the engine.
Roger
 
digger":20aa15ps said:
If 1 of the fuel pumps is driven by the camshaft, a ruptured diaphragm can leak fuel into the crankcase via the valve train area. That could explain the gas in the oil.
Click to expand...

Thanks
 
BrentB":3ejg1usi said:
Has it been scanned with diagnostic software?

Maybe just a bad sensor
Click to expand...

Yep. Marina ran all diagnostics, found only a timing issue that may be a false alarm,
 
rogerar":2w7yg8ke said:
Idle speed is controlled by the IAC (Idle Air Control). It is electronic and must be diagnosed by plugging the motor into a computer w/ SDS(Suzuki Diagnostic Software). Are you getting any trouble codes?
If its leaking exhaust from corrosion, you should get 1 or more trouble codes from the engine.
Roger
Click to expand...

Nothing other than a possible timing issue. Marina returned Mikey to me running ok yesterday, So far, so good.

Thanks to all for the help!
 
thanks

Any explanation on gas in the oil?

How old are the thermostats?

The IAC can be removed and cleaned with throttle body cleaner and a few Q tips
 
BrentB":1bjs2k2g said:
thanks

Any explanation on gas in the oil?

How old are the thermostats?

The IAC can be removed and cleaned with throttle body cleaner and a few Q tips
Click to expand...

No explanation other than possible timing advance problem. Therms are original 2005. Diagnostic shows no IAC issue.
 
mdoug":380b20n8 said:
rogerar":380b20n8 said:
Idle speed is controlled by the IAC (Idle Air Control). It is electronic and must be diagnosed by plugging the motor into a computer w/ SDS(Suzuki Diagnostic Software). Are you getting any trouble codes?
If its leaking exhaust from corrosion, you should get 1 or more trouble codes from the engine.
Roger
Click to expand...

Nothing other than a possible timing issue. Marina returned Mikey to me running ok yesterday, So far, so good.

Thanks to all for the help!
Click to expand...

What did the marina do to the engine?
 
Captains Cat":11bg40pk said:
mdoug":11bg40pk said:
rogerar":11bg40pk said:
Idle speed is controlled by the IAC (Idle Air Control). It is electronic and must be diagnosed by plugging the motor into a computer w/ SDS(Suzuki Diagnostic Software). Are you getting any trouble codes?
If its leaking exhaust from corrosion, you should get 1 or more trouble codes from the engine.
Roger
Click to expand...

Nothing other than a possible timing issue. Marina returned Mikey to me running ok yesterday, So far, so good.

Thanks to all for the help!
Click to expand...

What did the marina do to the engine?
Click to expand...

Not much! Getting new suzy90 installed on June 28. Enough is enough.
 
Back
Top