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4o hp 4 stroker mariner/yamaha. manifold vac test results

pirate pete

New member
bogging out under load nearly stalls but back off then back on and will go abit better, tested fuel pump..fail.. replaced with new ,checked carbs circuits clean but still cleaned more anyhow. needles good float hieght good in spec(had no spec for float drop) , valves in spec. timing at 10 (yamaha's run at 5 ???) few ohms tests on ignition all in spec,. syncin carbs manifold vacuum tested on all cyls at idle rapidly moving between 5 and 20 ??? head gasket, timing, intake leak( confident no leak between carbs and manifold)
 
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