RPM GUAGE VOLVO/Bayliner Capri 1983

[eyezaiah]

I have a 1983 Bayliner Capri. It has a Volvo penta AQ125A motor and a 270 volvo outdrive, the Carb is a solex one barrel job. It doesn't appear to have any fuel filters that I can see. I have a couple problems: <br />I am trying to get the RPM guage to work. It did not work when I purchased the boat. any Ideas on where I should start and what to check? Not sure where to start. Does anyone have specs or wiring diagrams for this engine/boat. wot rpm, idle rpm.<br />I have no idea how fast this boat should go. <br />Minor problem I have is that the engine runs fine After I let it warm up for a minute or two. If I try to take off from the pier with the engine cold after starting the engine will stall out if I try to give it any throttle past idle speed. If I Play with the throttle a bit I can get past the engine dying out( by throttling up and down). I also see what appears to be a black residue on the back of the boat every time I pull it out of the water (which is pretty hard to wash off). Does that mean the engine is running rich???<br />I have not tried adjusting the carb at all. I've tried cleaning the carb and flame aresstor with B-12 spray. Not sure how to adjust the carb. Thank you for your time and knowledge.

 

[Engineer0704]

Re: RPM GUAGE VOLVO/Bayliner Capri 1983

If you're looking for a good manual for a Volvo-Penta stern drive, I believe that Seloc publishes one. You can probably find it on amazon.<br /><br />If the engine is stalling under load when cold, it may be a problem with the automatic choke (if your engine has this). I once had a similar problem which was caused by a faulty choke thermostat. I replaced the thermostat and adjusted it according to the manual, and all was well.

 

[Dunaruna]

Re: RPM GUAGE VOLVO/Bayliner Capri 1983

Hi Eyezaiah, <br /><br />

Originally posted by eyezaiah:<br />[QB] I have a 1983 Bayliner Capri. It has a Volvo penta AQ125A motor and a 270 volvo outdrive, the Carb is a solex one barrel job. It doesn't appear to have any fuel filters that I can see.]<br /><br /> Follow the fuel line from the tank, should be a filter somewhere unless it was removed before you bought the boat. If it hasn't got one, go to your marine supplier and get a filter to suit your boat (water/fuel seperator is a good idea).<br /><br />[I am trying to get the RPM guage to work.]<br /><br />The tach runs off the negative side of the coil, could be a bad connection, broken wire to the tach or a faulty tach. If the connection is o/k do an OHM test of the tach wire (grey) from the coil to the tach.<br /><br />[Does anyone have specs or wiring diagrams for this engine/boat. wot rpm, idle rpm.]<br /><br />Plug gap - .28, Point gap - .016/dwell - 62+-3, timing - 10deg BTDC at idle (900rpm), wiring diagrams can be found in most workshop manuals, I've just checked the clymer B770 and it has the diagrams you need including the breakdown of the carburettor - I suggest you buy the manual.<br /><br />[I have no idea how fast this boat should go.] <br /><br />The $64,000 question, too many variables to give you an answer. Lets leave that for another thread.<br /> <br />[Minor problem I have is that the engine runs fine After I let it warm up for a minute or two. If I try to take off from the pier with the engine cold after starting the engine will stall out if I try to give it any throttle past idle speed. If I Play with the throttle a bit I can get past the engine dying out( by throttling up and down). I also see what appears to be a black residue on the back of the boat every time I pull it out of the water (which is pretty hard to wash off). Does that mean the engine is running rich???<br />I have not tried adjusting the carb at all. I've tried cleaning the carb and flame aresstor with B-12 spray. Not sure how to adjust the carb. Thank you for your time and knowledge.] <br /><br />Yes, time for a carb rebuild I think, follow the manual, the solex ain't hard to do.<br /><br />Aldo

 

[Don S]

Re: RPM GUAGE VOLVO/Bayliner Capri 1983

The 125's don't have chokes, so until they warm up they can be a bit of a chore to keep running.<br />The black on the back of your boat means it's running rich. Check the flame arrestor. If it's dirty and plugged up it's just like having a choke on all the time.<br />You might check the gray wire from your coil to the tachometer. That is the senser wire for the tach. You also need a purple wire for power to the tach and a good ground. If all 3 are good, replace the tach.