1975 Evinrude 2HP Model 2502 Full Factory Service Manual, Page 42Get this manual
DESCRIPTION
EXHAUST RELIEF
No rma ll y, ex haust gases conducted down throug th exhaust housing and out th underwat outlet in the gearcase The sip honin action of
the propell er and water pr ovides an unrestricted escape for exhaustSW IVEL
HIGH SPE ED
BRACK ET RETA INER SCREwS
Howevein start ing, water in the outlet eates back pressure and hard sta rting Exhaust eli ef is provided by another outl et ocat ed in the wat disc harge passage above he wate lin eSince no water is dis har ged until aft th motor sta rted, th exhaust gases will initially be disc harged th ough th water outletSee Figur 6- 1WATER UM P
EX HAUST
REL IEF HOL ES