boat stalls when put in forward

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  #1  
Old 06-26-04, 03:44 PM
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boat stalls when put in forward

My 1984 bayliner w/ 4cylinder volvo penta seems fine but after about 5 or 10 minutes of no wake idle or neutral I give it a little gas and it dies.Not every time but enough that it doesn't surprise me.If I try to start it I usually have no luck.Sometimes it takes waiting for 15min.I only had the boat out once since buying it.The guy never had any problem with that.He did run it empty on the day I checked it out.Is it possible that junk from the bottom of the tank is doing this?There is an inline filter.
 
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  #2  
Old 07-01-04, 05:21 AM
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It sounds like the ignition system may be a little weak. Does it have electronic ignition or points? How long since it had a good tune up?
 
  #3  
Old 07-01-04, 06:05 AM
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Lightbulb Additional Possibilities

Hello: trebor

Desi501 is on track. Possible the ignition system is weak. But more specific and detailed information would help plenty to diagnose this type a problem. Specifically the type of ignition system...electronic ignition or contact points?

Another easier condition to diagnose is the fuel supply system. Based upon the described condition, may be a fuel restriction somewhere in the tank to the carb. Which includes the fuel lines, filter(s) fuel pump and or in the carb.

Very possible stale fuel was present prior. Which gummed up the fuel system. Checking this is easier than ignition diagnostics. Also more likely the cause.

Fuel system has to be cleaned out and or flushed out. Filter replaced. Pump checked and cleaned out, if needed. Carb cleaned out and or cleaned out and rebuilt with new parts.

Once the above can be positively established the fuel system is in perfect working order, than the ignition system can be suspected. The fuel system can be a do it yourself task.

The ignition system possibly a do it yourself task, with the proper testing methods and repair equipment. Try changing the spark plugs after inspecting and cleaning out the entire fuel system up to but not the carb.

Unless you are able to do carb work or know of someone whom can assist you, if needed. Best to have the specific carb service repair manual handy.

Ignition systems also vary widely. Timing advance from idle to speed has to be set and operating correctly also. Sometimes the linkages from the helm to the engine are to fault.

Other times the gear shift engage linkage isn't set correctly. This setting sometimes isn't even set correctly at dealers, since there is no means to test for proper operation while dry-docked.

The resident boat service & repair professionals may have additional helpful information, suggestions and advice. Check back on your question several times for additional replies.

If you need further assistance, kindly use the reply button to add any additional information or questions, etc. to this thread. Using this method also moves the topic back up to the top of the daily list automatically.

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  #4  
Old 07-01-04, 06:58 AM
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Thanks for the reply

Since asking for advice I have done some things allready.First I spayed carb cleaner in carb.I changed the fuel filter and replaced the spark plugs.The gas is new and the tank is venting properly.The motor is a Volvo Penta AQ125A 4clylinder with pionts and condenser.I'm not sure if what I allready have done has fixed the problem.Its funny but in the driveway it seems to run fine.The boat acts as if the idle is set too low for foward gear but seems fine in neutral.Is there any adjustment just for that?It seems to bog just in that spot.Thanks for the help.
 
  #5  
Old 07-01-04, 01:00 PM
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Wink

.First I spayed carb cleaner in carb.
Take it apart and clean it right if gas was left in it that wont clean it out

.Its funny but in the driveway it seems to run fine.The boat acts as if the idle is set too low for foward gear but seems fine in neutral.Is there any adjustment just for that?It seems to bog just in that spot

Dont run it in the drive way. You cant tell ,its not under a load.


ED
 
  #6  
Old 07-02-04, 05:42 AM
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thanks

I'm going to take the boat out tomorrow.Thanks for the help
 
  #7  
Old 07-02-04, 06:27 AM
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Hello: trebor

Based on what you already have done and the problem description now, the symptom is likely to be a carb fuel flow restriction. Commonly refered to as an "Off Idle Leanness"

A condition which means the low speed fuel circuit inside the carb is restricted or slightly restricted. Spraying carb cleaner into the carb does not resolve that type of condition.

Only positive means to correct a carb problem with the condition described above and the problem you described, is to disassemble the entire carb, soak it in carb cleaner. Once soaked, usually 20 to 30 minutes, the parts are flushed with water and compressed air is blown into all the visable holes & ports.

That type of carb overhaul and assembled with a new carb kit parts will ensure proper fuel flow through the carb. Reinstalled onto the engine correctly, the engine will run correctly.

Assuming the carb is in fact the exact problem cause, rebuilt & reinstalled correctly and all other possible conditions are correct. A carb major overhaul as described above is often best left to the pros whom have the tools, skills, parts and prior experience doing major carb overhaul work such as this.

Good Luck & Safe Boating.
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  #8  
Old 07-02-04, 09:24 AM
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thanks again

I am going to take the boat out with a friend that knows his way around boats much better than I do.He told me almost exactly what you have.He said it would be ideal to run it on the water to check.He also mentioned that the boat is idling low in nuetral.He told me not to rule out some sort of a choke problem,but most likely it would need a carb rebuild.Thanks again for all the help I recieved.Any input is greatly appreciated.
 
  #9  
Old 07-03-04, 09:51 PM
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problem solved

I just wanted to let everyone who offered advice or was keeping up with the problem I was having that we fixed the boat.We started the boat on the trailer and noticed that the boat was idled at 500 in neutral.When we put it in gear(foward)it dropped down a little more.We raised the idle to 800 in neutral and it seemed to sound better.In the water the boat started up without any trouble and ran great all day.
 
  #10  
Old 07-06-04, 08:01 AM
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Lightbulb Same issue ( see ... run-on normal? thread.)

I have the same issue with my new ( at the time) Mercruser I/O. I was told its the gas I'm using, sounds like I should take your responce back to the dealer and have them adjust the carb. while its still under warrenty!

Do you have a run-on issue also?
 
  #11  
Old 07-06-04, 06:48 PM
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Sorry to hear about your trouble

Hopefully you have some luck with the dealer.What exactly do you mean run-on issue?
 
  #12  
Old 07-07-04, 12:37 PM
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Volvo Penta Outdrive info

I have been trying to figure out what is what on the outdrive.The outdrive is a 1984 Volvo Penta 270.First off I believe I have a leak in one of the rubber boots.There are two (boot) type hoses and one smaller rubber hoses coming from the back.One looks to be the connection from moter to outdrive.The other I think is an exaust line.Its longer and thats the one that has the tiny hole (the leak).The other I believe is cooling water suction line.I would like to replace the bad hose right away.It looks like it would be fairly simple,but I would like to be familierized with what everything is before I just start getting to work.Any help would be great.Thanks
 
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