Hard Starting Mariner

I have a question that I need help with!  I have a 79 140 Mariner Inline 6.  It is hard to start...and I have to turn the throttle up wide open...turn it over...until it finally hits...after sputtering for a while.  After I get it going...and I turn down the throttle since its revs up somewhat when it first hits...its fine...but if I cut it off...wait an hour...I can't walk over, turn the key, and it start right up.  Do I just have a weak spark?  Should I replace the coil and spark plug wires because itís not getting a good spark?  I've gone through the carbs...and all the fuel lines...so there is nothing wrong with the fuel system.  Could it be the timing?  Can you change the timing for these motors?  Any info is much appreciated!  Thanks for the time...I appreciate it very much!  Thanks again! 

Don
Knoxville , TN

I would look down the cylinder ring condition and reed valve condition. If these are weak, it wonít pull in the fuel charge. I doubt it is timing or electrical. One note: if it turns over slowly from a weak starter, the spark will be marginal.

Randy

 

 

Please submit whatever questions you have to IHRTechTalk@yahoo.com.  All questions and answers selected will be displayed on this page as they come in.  Note: though all boaters are welcome, priority may be given to I.H.R. members.  Randy can not be held responsible for any advice given.  Though his information and expertise is second to none, he has no control over what you do with your boat.  It is up to you to boat safely and act responsibly, and his advice is only to be used as a guidance for your high performance boat/motor of which you are the one responsible for the risks involved.

Thanks,
Mark C.

 

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