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 Catalina/Capri 25/250 Sailor's Forums
 General Sailing Forum
 1983 mariner 9.9 --SOLUTION		  New Topic  Topic Locked
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ed_spengeman
1st Mate

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USA
98 Posts
Initially Posted - 07/20/2007 :  11:05:35  Show Profile
I previously posted problem. Engine would start but if you tried to move the control from the start position, it would die. At this point, plugs were wet.

Carb re-built, timing and compression checked, good spark, good gas, new fuel pump. SAME PROBLEM.

Cut to the chase. Took off head and found that the exhust ports (rectangular) were mostly clogged where they transition into a tube. Full of carbon. I was using good gas and good oil.

Soooooo. Not just fuel, air and spark. Add back-pressure.
ed spengeman
Indianapolis (geist)
Port Captain
Palakida
83 tr/sk
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Notice: The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.