running blower.

[cdt785]

Hi. If I stop for about a half hour to fish,should i always run the blower first before i restart? Will that help it start up easier without a lot of cranking? I have a 3.0 mercruiser with a carb. Not sure if I should pump the throtle first before I crank it. Any Ideals would be appreciated. Thanks.

 

[chriscraft254]

Re: running blower.

Your blower is used to evacuate any fuel/gas fumes from the engine compartment. To be safe, yes, you should always run your blower before starting the motor. It is recommended to run it for 5 minutes before starting and leave it running until underway.

Most mercruisers want a full throttle action to get it kicked over in my experience.

 

[NW Redneck]

Re: running blower.

Yes, always run the blower before each startup like chriscraft said.

Most carbed I/O's I've been in/used like the throttle pumped 2-3X then pushed forward approx. 1/3 for cold starting. On warm starts it may just need the throttle pushed forward about 1/3 of the way, or some like one pump first. My boat likes two full pumps then to 1/3 forward when cold, and maybe 1/2 a pump when warm. (1976 302 Ford)

 

[spdracr39]

Re: running blower.

My 5.0 carb requires no throttle to start just turn the key. All are different so just see what works best for you. Yes run the blower its not worth the risk unless you raise the engine cover and smell for fumes then it's not necessary.

 

[mpdive]

Re: running blower.

My 3.0 is just a turn of the key when warm, Always a good idea to run the blower before startup or when cruising at slow speeds. Plus the sound covers up any complaining from the inlaws.

 

[Fordiesel69]

Re: running blower.

The only time the blower does not need to be used for starting is when you or your passenger has a health emergency AND you smell the compartment first. On my boat that I own now, it never ever builds up fumes of any sort. However if somthing goes wrong just one time, boom!

 

[glennj3]

Re: running blower.

After having work done on my boat, once I noticed the gas line from the tank to the carburetor was rubbing on the fly wheel. It was about half worn through! Used some nylon ties and pulled it over. That was no doubt a close one. Anytime air is moving by the boat the vents should move air in one side through the engine compartment and out the other such as while being pulled on the highway or driving in the water.
Always use the vent fan prior to cranking and if you smell gas, just don't crank her until you find out why.
Opinion.

Glenn

 

[cdt785]

Re: running blower.

Thank you all for taking the time to reply. I appreciate your input.