hard starting

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cdt785

Seaman
Joined
Sep 4, 2011
Messages
50
Hi. I have a 17' bowrider with a 3.0 Mercruiser engine. It has a carb that was recently rebuilt. I trailer it to my local launch site. Seams like every time I launch it, I set the choke, pump it twice and it starts right up. After driving it for a while, I'll shut it off for crabbing or relaxing. When I go to start it up, sometimes it really cranks over a lot to start it back up again. Any ideals why it does this? Any tricks to help it start faster? Thanks in advance.
 
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Another retired guy

Ensign
Joined
Jun 17, 2012
Messages
940
Re: hard starting

To start a warm engine you need to have the control lever approx 25% forward. No pumping. This allows more air in to compensate for the choke which will start to close as the engine cools.
 
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cdt785

Seaman
Joined
Sep 4, 2011
Messages
50
Re: hard starting

Another retired guy said:
To start a warm engine you need to have the control lever approx 25% forward. No pumping. This allows more air in to compensate for the choke which will start to close as the engine cools.
Click to expand...

Thank you for your reply. I will try that next time out. Thanks again.
 
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skydiveD30571

Lieutenant Junior Grade
Joined
Feb 13, 2012
Messages
1,042
Re: hard starting

The official Merc starting prodecure for a carbed engine:

Push THROTTLE ONLY button and position throttle setting as follows:
COLD ENGINE - Move control/throttle lever to full throttle, then return to about 1/4 throttle. In extreme cold
it may be necessary to pump lever more than once.
WARM ENGINE - Move control/throttle lever to 1/4 throttle position.
FLOODED ENGINE - Move control/throttle lever to full throttle. Be prepared to decrease engine speed to
1000-1500 rpm as soon as engine starts.
 
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scarpint

Petty Officer 3rd Class
Joined
Aug 25, 2008
Messages
89
Re: hard starting

Are we thinking that 1/4 throttle is past the detent position when in neutral?
 
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