Double hose conversion

[GLEN DEUTSCH]

I am doing a double hose/single hose conversion. I know that you don’t need to go into the reed plate for some of the Evinrude/Johnsons but I cant remember after what year. Want to keep it simple.

[crosbyman]

what model engine is it ??? if 5.5 you may as well use the air nipple to feed your pump for other models 7.5 10hp …… I think the pump on a plate is the best way to go

presently working on a 10hp myself

you can also do a B &S pump on a frame attached to the back cross-bar if your engine has one… but you will need a vacum pulse either from the air pressure nipple or a drilled cover plate with the air pressure nipple block out with a piece of short fule line anda short bolts tuck in it

https://www.youtube.com/watch?v=ojOMbwvH55I
https://www.youtube.com/watch?v=FtG4M7ye1N8

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• This reply was modified 4 years, 7 months ago by crosbyman.

[GLEN DEUTSCH]

Thanks crosbyman. Very helpfull

[crosbyman]

if you do “pump on a plate” make certain you do not obstruct the cowl or any mechanical operation . Some square pumps have a thicker base and extent out a bit more

Drill the side cover plate 1/4inch just behind and in-line the square pump to get a crankcase pulse.

Off-set the pump with one bolt in the cover plate region and one bolt outside the cover . use the pump base gasket as a guide to properly position the pump and drill the 3 holes to mount the pump plate.

plate is 1/16 inch aluminum. the engine cover plate should be made 100% dead flat by doing figure 8s over 120 grit paper over a large glass or tile surface. it will be dead plat when all the paint is rubbed off and checked with a square edge for flatness.

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