87 capri problem

M

mycyl

Member
Joined
Jun 23, 2007
RO Number
26951
Messages
3
hey guys, i have the 87 bayliner capri with the 2.3L omc cobra. anyways the problem is when you get going, she runs good for a while then it starts missing and a serious loss in power. (enough to make you topple forward) itll do this runnin full out or at 10 mph..doesnt matter how fast your going. has anyone else had this problem with this or other boats? im thinking maybe it the wire/plugs? or maybe the carb?

also im told this engine is supposed to be 165 hp but she tops out at about 30 mph (when shes not missin) is that about right?
 
Need a time factor thrown in. Does it happen faster with full throttle? anything else you can tell us?
 
ok sorry, she usually runs fine for the first 10-15 mins or so then it starts doing this intermittently. ive done some research on the net and found another guy with the same problem, they told him that it might be a clogged fuel line or the float? if it was a float what float would it be? the carbs? or the gastanks?
 
Years ago I had a boat with a 3.0 OMC and it had symtoms that sounded similar to yours. It would idle fine but then when I brought the boat onto plain it would run fine for a while then the engine would start missing. We checked fuel lines, filters, ignition and it really had my mechanics baffled because when the boat was on the trailer and not under load they could not duplicate the problem. Finally they got on the phone with the the manufacture and traced the problem to a "supresion wire" I frankley don't know what this is but I beleive they told me it was connected around the distributor.
 
thanks for your help guys, we decided with it missing and all we would switch up the plugs and wires, change the fuel line and a couple other little things, anyways when we pulled the plugs out, 3 were clean looking champions but the 4th was a dirty no name plug with no gap on it whatsoever. we also discovered one of the wires were just sittin on the plug, not pressed on..so we put her all back together and took her out. we were out there for about 6 hrs without her doin it once...think we licked the problem. again thanks for the help!
 
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