We have a merc. 125 6 cyl aprx late 70's mdl we read another topic about <br />Octane rating on 6 cyl. merc's 87 vs 93 but most hi octane fuels have alcohol in them.<br />The marina we visit says no no on alcohol. Who's right??????<br /> Thank's GWOODI2002
New pontoon owner 25' w/ 125 merc. had 85 rude on it cavatated badly, lost cyl on rude putting 125 merc on .We don't want any cav. problems<br />it has a whale tale on it. Should we mount mtr. so whl. tale is flush with bottom of pontoons? Thank's for any help GWOODI2002
