88 Omc cobra cut out>>>??

[vonway]

As in a previous post ,, my four winns v8 Omc I/o cuts out between 3000 and 3500 RPMs.. getting on plane is no problem and at speeds under 3000 rpms noo problem.>?? why is this cut out or loss of power at 3200 RPMS? Thanks. Engine is firing on all 8 cyl. and revs up great in nuetral. Could this be in the shifter? adjusment>?

 

[20/20]

Re: 88 Omc cobra cut out>>>??

You may get a faster reply under the mechanical part of the forums

 

[JB]

Re: 88 Omc cobra cut out>>>??

I/O topic

 

[Boatin Bob]

Re: 88 Omc cobra cut out>>>??

What do you mean by cuts out? Does it bog down or actually stall/shut off? Is this a 4 barrel carb, thats about the range you would expect the other 2 barrels to open up.

 

[vonway]

Re: 88 Omc cobra cut out>>>??

its a 2 barrel.. and it feels as if you slammed the throttle to neutral. Just cuts out and boggs until you lower the throttle?? weird .. it only does it betweenn 3k and 3500 ..

 

[RubberFrog]

Re: 88 Omc cobra cut out>>>??

Are you getting enough fuel?

 

[Don S]

Re: 88 Omc cobra cut out>>>??

Check the screen on the fuel pickup tube in the fuel pump. They get plugged some times.<br />Could also be a plugged anti siphon valve. <br />Water or dirt in the fuel filter.<br />Low output from the fuel pump.<br />May also be electrical, when was the engine last tuned up. Points, cond, cap, rotor, plugs, timing, carb adjustement.<br />Have you looked at the flame arrestor. I've seen the so plugged up with dirt that it's a wonder the engine ran at all.

 

[vonway]

Re: 88 Omc cobra cut out>>>??

Thanks Don... the engine was just tuned up in April. Had a get a new Distributor put on..and some other repairs.. Mechanic changed all pointes rotor cap plugs and set timing, repl fuel filt.?? so i think i will look at fuel pick up or antisiphon...

 

[vonway]

Re: 88 Omc cobra cut out>>>??

well heres the deal.. kinda got screwed ( I THINK)<br />had my mechanic come out and go for a drive on the boat, and he suggested that he was sure it was the antisiphon valve.. so we go back to dock and he pulls up the floor to get the antisiphon off and seems to be ok.. tries running without to see if it corrects the problem.. no go.. so as we float out on the lake pondering what it could be.. the fuel pump?? well , I suggest the carburator fuel filter..( he says no.. usually that wouldnt cause the problem you are having. I say "I have a spare on the boat in my toolbox.. lets try and see (cant hurt.. ) So we change the filter and just as he pulls it out, he says" OH YEAH heres the problem... the paper type filters are junk. So he installs my spare part, and we run the boat.. What do you know.. PROBLEM SOLVED>>> no sht. Now i bet he feels dumb. So we pull back in the marina and he tidys up his toos and so on.. goes to W Marine to get a replacement antisiphon valve (cuz he broke the original, Comes back and installs it.. and then says , you know i am going to have to charge you something.. (total time on my boat=1 hour.. ) He claims 1.5 hrs of labor $75 and $20 parts... (WHAT??) I diagnosed the problem and had the part on hand. He replaced the antisiphon cause he broke it... And on top of it He gouged me on the part..said it was $20- (I went to west marine after and saw that it was only $13. And west marine is about two minutes from my marina. What a dic... i feel i got ripped off. OH well (LIVE AND LEARN) what are your thoughts... THANKS

 

[Mahoney]

Re: 88 Omc cobra cut out>>>??

I would just inform him that you will let are your boating friends know your experience with him during this issue.<br /><br />However, give him a reasonable way to remedy this and make you happy. Regardless of who diagnosed what, you probably owe him the time. He was out on the boat per your request. I would definitely ask him why he feels the need to charge you for a working part he broke and for him to eat that charge.