1987 Bayliner Capri 2.3 OMC BIG PROBLEM

[szuwar]

First of all i would like to say HI to everyone on this forum, im new to boating and have been on this site since i purchased my first boat, somewhat a year ago and i think its the best forum out there as far as information goes and a number of people with really good expirience.Is i said im new to this and i have a big issue, I bought this boat a year ago with a cracked block,previous owner did not witerized it properly and cracked block,anyways i bough it thinking ill rebuld the engine , upholstery was ruined so basicly i ended up doing the whole boat,engine,interior,gauges seats etc. I bough a car engine at a scrab yard taken off the head had my block rebuild , original head from the boat rebuilt changed all gaskets ,sparks wires ,pointer, distr cup ,starter etc. After we started the engine it was running rough so i pulled the boat to the marina and had the mechanics to tune the engine change oils and change couple of seals and berings between the outboard and transom.Paid over 1000 dollars and got my boat back but it would stall as soon as i put it in wated and try to accelerate, i brought it back to marina and they said it would be the carb so they got it rebuilt and they took the boat on the water but the problem is still there, checked fuel pump ,even ran it on seperate fuel tank just to make sure and still same problem, marks are at 10 deg idles at 600-650 rpm perfect, on muffs revs and all is good ,as soon as it gets load it chokes and dies,they said when they move their marks to 16 deg advance timing it runs better but still stalls, im at the point where i spent over 6000 dollars on everything and my boat still dies when on load and try to accelerate, i would like anybody with some knowledge and expirience to maybe point me in a direction as i know there are really smart people on this forum, PLEASE HELP , The way the boat turned out is amazing and i would really like to ride it after a year project and all this money spent, just if it wasnt for this problem im having, thanks in advance LUKE

 

[Bt Doctur]

Re: 1987 Bayliner Capri 2.3 OMC BIG PROBLEM

You built a new motor, how much run time did it get before you put it in the water? Was the cam timed properly during the rebuild?
Are the valves adjusted correctly?
Was the manifold checked for cracks or leakage before assembly.
Check the plugs to see if any are whiter/ pure white compared to the others

 

[szuwar]

Re: 1987 Bayliner Capri 2.3 OMC BIG PROBLEM

The engine was ran for not too long, and whatever time at the marina where they new its new and whatever it took to tune it up, its a pretty big marina in toronto i suppose they know what they are doing ,unless im wrong, they have pretty good rep and few mechanics.Spark plugs are ok, engine and cam was done by a engine rebuilders company and they claim they set everything as supposed to be ,block and head was put on together by them and set all to marks, im thinking it has something to do with the valves not opening and closing as supposed to , as for manifold i didt check but could it be something to do with that , and how do i check HELP, more thortle - engine has no power or losses power.

 

[szuwar]

Re: 1987 Bayliner Capri 2.3 OMC BIG PROBLEM

Hi all just to update, when changed the mark one tooth as i mentioned above, now the max rpm i get is around 1800 and no power from engine ,just drifting slowly ,max throtle and around 1800 - 2000 rpm, im at 12 degrees now ,cant get any lower at distributor , i can advance it to 32 or so ,please someone help, im stuck, what else should i check for , intake seems fine i was told ,but how do i check the intake manifold, its strange that out of water i can accelerate fine on muffs in gear, but on load i cant get past 2000 rpm and doesnt push .What would be a step by step procedure according to you guys, set both marks bottom and top , run and time it with strobe light to get tdc0 than advane it with distribuor to 10 , and should be fine , but it isnt, cound the rebuilder scred something with putting a wrong camshaft oposed to my original one ,because thats what im suspecting ,how do i tell a difference between automotive one.PLEASE SOMEONE HELP , i know there are good mechanics here HELP,