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1980's Johnson/Evinrude 20/25hp conversion to 30hp with pics
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<blockquote data-quote="vahunter" data-source="post: 373975" data-attributes="member: 6815"><p>Edstrossner, can you benefit from skimming a '90s head or is '82 head a different design in general? I thought about skimming mine but I also wanted to keep my motor dependable. I also swapped intake manifolds to the bigger cavity 30hp one and swear I lost a little power than with my 25hp manifold and 28hp carb. </p><p></p><p>Thill, mines a tiller. No PT but a manual jackplate. I'm running 6100rpm at 31mph, if I remember right, on light load. Trolling motor, 2 batteries and myself. Medium load (1 passenger and fishing gear) about 29-30mph. Heavy load (popup duck blind, 2 passengers, dog, 5dozen decoys, guns, etc.) I never checked mph but probably 25ish and forever to plane. I run a 10x13 omc SS prop. I could run a 15p prop in normal conditions but this is a good all around prop for me.</p><p></p><p>Btw in the summer, due to lighter loads (higher rpm) I run 40:1 fuel-oil mix.</p></blockquote><p></p>
[QUOTE="vahunter, post: 373975, member: 6815"] Edstrossner, can you benefit from skimming a '90s head or is '82 head a different design in general? I thought about skimming mine but I also wanted to keep my motor dependable. I also swapped intake manifolds to the bigger cavity 30hp one and swear I lost a little power than with my 25hp manifold and 28hp carb. Thill, mines a tiller. No PT but a manual jackplate. I'm running 6100rpm at 31mph, if I remember right, on light load. Trolling motor, 2 batteries and myself. Medium load (1 passenger and fishing gear) about 29-30mph. Heavy load (popup duck blind, 2 passengers, dog, 5dozen decoys, guns, etc.) I never checked mph but probably 25ish and forever to plane. I run a 10x13 omc SS prop. I could run a 15p prop in normal conditions but this is a good all around prop for me. Btw in the summer, due to lighter loads (higher rpm) I run 40:1 fuel-oil mix. [/QUOTE]
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1980's Johnson/Evinrude 20/25hp conversion to 30hp with pics
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