New to boating and very weird....

[Browning83]

Thanks for the add.... this is gonna be alot but stick with me.... so I'm a first time boat owner (the famous get a boat it'll be fun ) anyway 18ft cutty 185 go merc alpha one out drive.... someone put new wood floor and built wood cover over engine a lot of an extra weight....? So story goes it sat for while.... GREAT lol .... so had oil leak in drive got resealed new bearings ect... tune up oils runs great... get on water first trip 2 people 400lbs normal gear full gas ... won't plane unless one of us get in front.... top speed 30 wot 3k rpm.... Ok put hydro foil on it take out same luggage planes fine top speed 20 mph 3k rpms.... foil dragging? So change prop from 14.5inch 19 p to a 14in 13p. New out of box Go out 3 people 550lbs take off feels good stops pulling like slipping... wtf... check it... all tight good .... try again same notice it slips or free spin at 3k rpm.... wtf... let off gas nothing ... won't in gage gear or pull again unless I put in neutral first after it slips or whatever it's doing won't pull just revs.... so pull boat out change prop back to old one and .... 15 mph... 2k... rpm wot put weight all in front don't matter still same please help lol...

 

[Scott Danforth]

welcome aboard

slow down and add some punctuation. most importantly add spaces and line returns

first, throw the DA@#$%@#$%@#$ foil in the garbage. they have zero benefit other than to empty your wallet. they cause failure to many outdrives

PM a mod and move to the proper Mercruiser forum

every forum has stickies at the top. start reading them

specifically link #15 of this http://forums.iboats.com/forum/engi...ion-for-diyers-an-work-safe-search-version-of you most likely have fuel system woes and changing your prop isnt the cure

3000 RPM is way way too low or RPM

and most importantly, which motor/drive do you have (year and serial number help). if you have the dreaded 3.7 liter 185hp motor, start reading up on the merc 470 and start by going thru all the required updates to keep that turd running

if it is the 470, you should have came to iBoats and asked the opinion on the motor prior to buying it. Run...Forest....Run is the common chant

 

[garbageguy]

This is a great place to get the help you seek. In addition to the above, get a coiuple more posts under your belt, and post some photos of your boat. Thousand words...

"new wood floor" typically rings a potential alarm - how are the stringers and transom? Any waterlogged foam, wood, etc giving the boat extra weight?