"I'm in the process of res
"I'm in the process of restoring an old tri-hull with an AQ200D - 280leg. First time out on the water I noticed two problems. What I initially believe to be an engine miss and she wheezed, caughed, spit and died when I put the throttle to her. I've since gone through the fuel system, pulled and cleaned the pre-filter by the pump, the pump itself, carb filter and rebuilt the carb. I ran it on the muffs from a portable tank with fresh fuel after this and I think I may have that issue solved, throttle response much better from what I can tell on the muffs. I won't know for sure until the weather clears and I can get her on the water and under load again.
But...The mysterious engine miss/clunk is still there so it's likely electrical as opposed to fuel related (if it is a miss) given what I've done so far. It's an intermittant, loud clunk at idle speed that you can hear and feel on the engine, deck and at the drive. It does this both in neautral and in gear. I'm going through the electrical now. The plugs/wires are new. The points were replaced by an igniter by the previous owner and I noticed that the timing was set off the scale (but it runs fine outside of this clunk). I've reset the timing to 8 deg BTDC as per the book and that clunk is still there. I've pulled and inspected the plugs (look fine), completed a compression check (all good - engine rebuilt last year according to previous owner)
I just can't figue out if it actually an engine miss or something else. When it happens, the exhaust spits, the hull shakes and the engine RPM's increase for a split second until it levels out. You can feel it bump in the upper gear area of the drive. My question (long way to get there) is: Is there anything in the leg that would do this while at idle, in neautral and in gear or should I be primarily concentrating on the engine itself.
If I were to compare the noise and the feel to something more familiar, it would be the sound and feel that bad u-joint makes on a car when you put it in gear; however, this happens in neautral, low rpm's about every 6 seconds. No differance when you put it in gear."
"I'm in the process of restoring an old tri-hull with an AQ200D - 280leg. First time out on the water I noticed two problems. What I initially believe to be an engine miss and she wheezed, caughed, spit and died when I put the throttle to her. I've since gone through the fuel system, pulled and cleaned the pre-filter by the pump, the pump itself, carb filter and rebuilt the carb. I ran it on the muffs from a portable tank with fresh fuel after this and I think I may have that issue solved, throttle response much better from what I can tell on the muffs. I won't know for sure until the weather clears and I can get her on the water and under load again.
But...The mysterious engine miss/clunk is still there so it's likely electrical as opposed to fuel related (if it is a miss) given what I've done so far. It's an intermittant, loud clunk at idle speed that you can hear and feel on the engine, deck and at the drive. It does this both in neautral and in gear. I'm going through the electrical now. The plugs/wires are new. The points were replaced by an igniter by the previous owner and I noticed that the timing was set off the scale (but it runs fine outside of this clunk). I've reset the timing to 8 deg BTDC as per the book and that clunk is still there. I've pulled and inspected the plugs (look fine), completed a compression check (all good - engine rebuilt last year according to previous owner)
I just can't figue out if it actually an engine miss or something else. When it happens, the exhaust spits, the hull shakes and the engine RPM's increase for a split second until it levels out. You can feel it bump in the upper gear area of the drive. My question (long way to get there) is: Is there anything in the leg that would do this while at idle, in neautral and in gear or should I be primarily concentrating on the engine itself.
If I were to compare the noise and the feel to something more familiar, it would be the sound and feel that bad u-joint makes on a car when you put it in gear; however, this happens in neautral, low rpm's about every 6 seconds. No differance when you put it in gear."
