Squadronleader
Cadet
- Joined
- Mar 30, 2018
- Messages
- 9
OK, so I am going to give a brief history, hoping someone can help me out. I bought this boat from a buddy. We had a deal while it was running fine, then one day while still in his ownership it wouldn't shut off. Long story short he bought a "new" used harness. Still couldn't get it going so he took off a rebuilt the carbs. Still couldn't get it going. This is where I come in.
I ended up tracing the problem to a bad rectifier, which in turn took out the cdi, or vice versa. It now will run on all four cylinders, and shut off fine. However, before I got it, timing, throttle, control, etc, etc, were removed, and the engine spun over and turned, so I bought the factory service manual, and just started checking things off, because between the net and free stuff out there I was getting conflicting numbers. Now, when I say checking things off I literally mean front to back. I am machinist/millwright by trade, done all my own vehicle and boat maintenance for the past 23 years, I am very ocd when it comes to this stuff, so I am hoping perhaps, I am just not reading something right.
Manuals say, put dial Guage in cylinder 1, set TDC at 0, then turn clockwise until dial Guage goes down 0.12" set timing mark on 22 degrees btdc. Got that. Now it says to set the control linkage lengths, bang on. Attach them. Fully retarded Timing mark at 5 degrees atdc, the mark on the magneto control Iines up with the mark on the underside of the flywheel. Fully advanced mark is at 22 degrees, and the mark on the magneto control lever lines up with the mark on the underside of the flywheel. Long story short statically, I set everything according to the manual, and I was going to dial it in with the timing light.
I try and start it, nothing. Won't fire, just killing the battery. I even bought a new battery. Now out of desperation, I tried starting it with the fast idle, (advances timing) it started instantly, and ran better than it ever has during this saga. I throw the timing light on it, it's way out according to the timing light. Like 15 degrees btdc. Ok fast idle is on. I let the engine warm up at a point where it would run at the lowest possible idle without dying. Once it was warm, I tried making some live adjustments. When I tried to get the dynamic idle, and Fully retarded timing to match the manual, once I would retard past 10 degrees btdc (closer to 5 degrees atdc manuals numbers for idle) it would just die. Like die even if I tried reving it with the throttle. The further advanced at idle it runs, the better the engine runs.
Things I have replaced. All fuel lines, filters, fuel, bulb, fuel pump, all vacuum lines, rewired, and confirmed all boat wiring is good. New deep cycle starting battery. Rectifier, cdi unit, oil level switch, carbs rebuilt twice. Once by a dealer, and once by me because I don't trust said dealer. Starter, um, I am sure there is more. Some stuff was because I am ocd, and some stuff was trying to rule things out.
Anyway, I realize this is all over the place, but I am hoping someone can read through my frustration, and perhaps ran into this before and can give me an idea of where to go. I am going to reconfirm all the static markings line up still, and go from there.
Forgive my spelling and Grammer. Out at the boat and just trying to send this off quick.
I ended up tracing the problem to a bad rectifier, which in turn took out the cdi, or vice versa. It now will run on all four cylinders, and shut off fine. However, before I got it, timing, throttle, control, etc, etc, were removed, and the engine spun over and turned, so I bought the factory service manual, and just started checking things off, because between the net and free stuff out there I was getting conflicting numbers. Now, when I say checking things off I literally mean front to back. I am machinist/millwright by trade, done all my own vehicle and boat maintenance for the past 23 years, I am very ocd when it comes to this stuff, so I am hoping perhaps, I am just not reading something right.
Manuals say, put dial Guage in cylinder 1, set TDC at 0, then turn clockwise until dial Guage goes down 0.12" set timing mark on 22 degrees btdc. Got that. Now it says to set the control linkage lengths, bang on. Attach them. Fully retarded Timing mark at 5 degrees atdc, the mark on the magneto control Iines up with the mark on the underside of the flywheel. Fully advanced mark is at 22 degrees, and the mark on the magneto control lever lines up with the mark on the underside of the flywheel. Long story short statically, I set everything according to the manual, and I was going to dial it in with the timing light.
I try and start it, nothing. Won't fire, just killing the battery. I even bought a new battery. Now out of desperation, I tried starting it with the fast idle, (advances timing) it started instantly, and ran better than it ever has during this saga. I throw the timing light on it, it's way out according to the timing light. Like 15 degrees btdc. Ok fast idle is on. I let the engine warm up at a point where it would run at the lowest possible idle without dying. Once it was warm, I tried making some live adjustments. When I tried to get the dynamic idle, and Fully retarded timing to match the manual, once I would retard past 10 degrees btdc (closer to 5 degrees atdc manuals numbers for idle) it would just die. Like die even if I tried reving it with the throttle. The further advanced at idle it runs, the better the engine runs.
Things I have replaced. All fuel lines, filters, fuel, bulb, fuel pump, all vacuum lines, rewired, and confirmed all boat wiring is good. New deep cycle starting battery. Rectifier, cdi unit, oil level switch, carbs rebuilt twice. Once by a dealer, and once by me because I don't trust said dealer. Starter, um, I am sure there is more. Some stuff was because I am ocd, and some stuff was trying to rule things out.
Anyway, I realize this is all over the place, but I am hoping someone can read through my frustration, and perhaps ran into this before and can give me an idea of where to go. I am going to reconfirm all the static markings line up still, and go from there.
Forgive my spelling and Grammer. Out at the boat and just trying to send this off quick.
