Offshoreonly.com - Boat Idles Weird?

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rollnhrd

07-11-2011 12:51 PM

Boat Idles Weird?

What cause the engine to idle up and down with in 200 or 300 rpms? While just floating.. any info would be great. Thanks mike

Ntrsspray

07-11-2011 02:25 PM

Blowers?

MikeyFIN

07-11-2011 02:53 PM

most likely a vacuum leak...

anewway

07-11-2011 03:13 PM

Possible Idle Air Control (IAC) valve defective

MikeyFIN

07-11-2011 03:29 PM

If we just knew what engine.... Carb or injection...IAC's are PITA's sometimes.. so are vacuum leaks... if a carbed engine the leak can be in the carb too... a real PITA to find out.

rw40426

07-11-2011 06:19 PM

Mine did that when I had a jacked up map sensor on it. 525

rollnhrd

07-11-2011 09:54 PM

its a 525 blower with 2 800s on it

FIXX	07-11-2011 11:21 PM

Fixx

Quote:

Originally Posted by rollnhrd (Post 3450120)

its a 525 blower with 2 800s on it

its called blower surge,,normal if you have alot of boost:drink:

Expensive Date

07-11-2011 11:35 PM

Quote:

Originally Posted by mrfixxall (Post 3450186)

its called blower surge,,normal if you have alot of boost:drink:

Yup and it sounds cool leave it alone.:drink:

Griff

07-12-2011 01:27 AM

The surge is caused by each revolution of the blower. Sometimes it can be reduced or eliminated with carb air bleed adjustments.

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