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About billnmush

  • Birthday 11/27/1961

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    Willits, Ca;ifornia
  1. You said you already checked the ground connections at the dashboard but there a few grounding points in the back at the motor also. Usually black wires are for ground in the automotive industry so I am guessing (and on my 1990 1800 SL) the same applies to boats. When I purchased this boat it had a plethora of trouble. Ground was one of those problems. My problem was found in the stern area grounding. All my gages are working now. Don't get to worried about the fuel gage as there are more wrong than right when it comes to correct fuel level.
  2. Ok, got the fuel delivery problem resolved! I added an in line, electric, low pressure, fuel pump and 2 visible fuel filters with a 10 amp fuse. I wired the new pump into an oil pressure sending unit and ignition switch. This way the pump gets 12vdc during starting and once the oil pressure comes up to safe operating pressure the pump then gets its 12vdc from the run position of the ignition switch. If the engine shuts off, the oil pressure drops and the pump is shut down. A great way to safely install and use an electric fuel pump on a carberated engine.
  3. I am having fuel delivery trouble with my 1990 Chaparral 1800 SL. So far I have replaced what I believe is a perfectly good fuel pump with a new one. I removed the out line from inside the fuel cell and checked the screen type filter on the bottom end and it is clear of all obstruction. I have replaced the fuel hose with the upgraded fuel hose from tank to pump, (just in case the line was breaking down internally.) I have completely discarded the fuel filter, (at least until I get this fuel delivery issue resolved.) Now this brings me to the forward, 151A, (late model), carburetor. There is a vacuum line that routes from the flange of the forward carb down to the fuel pump. The forward carb has very low vacuum and when adjusted for balance it runs like junk. The rear carb has terrific vacuum and can be adjusted like normal. I can find no vacuum leaks. OK, now the past symptoms are as follows; Drop boat in water. Fire off the engine and it fires right away. Sounds really good Take boat out on the water and run it hard or easy for 15 to 20 minutes. Stop engine and fish for an hour or so. Engine will not fire again and there is no fuel in the lines and/or carbs. I dont understand that vacuum hose from forward carb to fuel pump. What is that vacuum line supposed to do? Is that vacuum line there to assist the fuel pump ..... Kind of like a mechanical over vacuum (or vise versa) fuel pump? Why can I not get any measurable vacuum in the forward carb?
  4. OK, I am very new to boating. I purchased a 1990 Chaparral 1800 SL with a Volvo-Penta AQ250? engine and a Volvo-Penta SP-A outdrive. Many many small problems but none insurmountable. The power trim don't work. I did some research and found that there is a rack and pinion gear on the outdrive responsible for that. I inspected the boat and low and behold the rack is missing from that location. The pinion gear is there but no rack. Also while I was there I was trying to figure out this whole SUPER DIFFICULT TO STEER problem. I found what I would call excessive freeplay in the head unit that steers and trims the boat. I think I need to remove the outdrive and rebuild that entire location for the trim and steering. Now for the real problem! Where the heck can I find those parts? I am betting there is a rebuild kit out there somewhere that includes seals, shims, bushings and the like but for the life of me I cannot find them. When I look for those parts all I can find is the zinc or a couple other parts but not the rack or anything that resembles a rebuild kit for steering and trim. OK, so apparently I cannot post images large enough to look at. The 5K requirement makes it waaaaaaaaay too small to view. Any help is apreciated HELP!!!
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