Originally Posted by jakew009
Does anyone have an opinion of Merc 9.9 vs Suzuki 9.9 EFI?
They are both a similar price but the Suzuki doesn’t have a carb. The non EFI Merc is slightly cheaper.
The only advantage of the Merc is it would match the main engine.
Merc does an EFI but it’s much heavier as sedated 15hp.
In terms of shaft length, I assume that as long as the prop is below the bottom of the hull, it doesn’t matter how long it is?
Suzuki EFI over Mercury carb wins it for me all day long. If you get a used one then 9.9hp out of an engine designed for 20hp means it's never going to have had a hard life. If you buy new then derestriction is always an option in the future.
Here are the three components needed to liberate it: (an easy 10min fit)
Suzuki 9.9/15->20hp efi parts:
13710-89L00 Flame Arrestor $10
13832-89L00 Silencer Seal $8
33930-89L20 Engine Control Unit $422
A decal kit will match it to the main engine.
You may not need a long shaft, it's only operating at displacement speed so short shaft is an advantage if there's sufficient depth to avoid prop ventilation.