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OMC 43L HO Hard to start when cold

davidlyne

Member
"Hi, I am new to this and woul

"Hi, I am new to this and would like to ask the following questions.

My OMC 4.3lHO is hard to start when cold, after being left for around 1 week. Runs and starts fine all other times. It is a carburetor model and has the spitfire electronic ignition.

The choke appears to be operating normally.

It can take 3 or 4 atempts to start from cold then all is good. Sometimes prior to starting she may backfire. The manual says there is no timing adjustment for this model. As far as I know it has a manual fuel pump.

Also, I replaced the spark plugs and 2 of them look like they have been running hot(according to a picture) but the engine temp is always a little on the cool side, it never over heats

In Australia I run the standard unleaded RON 91, should I use the Premium RON 95.

Thank you in advance for your time.
regards David"
 
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