wellcraft33
Member
Hello,
I have 2 crusader 454XL, both long blocks were purchased new, the port engine works perfect, the starboard does not have any power and will not rev past 2800 RPM. it idles perfect, smooth, no misfires, no missing, no shaking, and will rev as high as you want while in neutral. but when under load it feels like its towing another boat, almost like if it had a governor that does not allow it to rev past 2800.
Here is what I have done so far:
New spark plugs, new wires, new distributor(EST), new coil, new fuel pump, new fuel filter and filter housing, new fuel lines and new anti syphon valve at the tank. also checked the breather and ran the engine with the gas cap off. timing is set correctly and will advance to 30 degrees at 3000RPM, (in neutral) I also replaced the carburetor with a new rebuilt unit. The transmission is a brand new ZF63A. I exchanged transmissions between the engines and the problems persists. I checked the exhaust for blockage and can't find any, the manifolds and elbows are new. I also put a vacuum gauge on it and the manifold vacuum is constant at 21, it will not drop indicating and exhaust blockage and it does not increase to suggest and intake blockage. I switched between fuel tanks and no change.The fuel is fresh, Did a compression check on the engine (twice) and all cylinders have 140psi. I am getting a rattle noise in the transmission so I replaced the damper plate with a new one and the noise continues at low RPMs, goes away after 1200 RPM (probably torsional vibration from the engine) it also shifts very hard, in comparison with the other engine. I have also check the linkage cables and they open the carburetor fully.
The only thing I haven't changed is the alternator, which is brand new, not sure if that can cause the lack of power, it shows that its charging 14v.
I am pretty sure that I have listed everything I have done, I have been trying to get this engine to run for about a month now and I am just out of ideas.
I would appreciate any help I can get on this.
I have 2 crusader 454XL, both long blocks were purchased new, the port engine works perfect, the starboard does not have any power and will not rev past 2800 RPM. it idles perfect, smooth, no misfires, no missing, no shaking, and will rev as high as you want while in neutral. but when under load it feels like its towing another boat, almost like if it had a governor that does not allow it to rev past 2800.
Here is what I have done so far:
New spark plugs, new wires, new distributor(EST), new coil, new fuel pump, new fuel filter and filter housing, new fuel lines and new anti syphon valve at the tank. also checked the breather and ran the engine with the gas cap off. timing is set correctly and will advance to 30 degrees at 3000RPM, (in neutral) I also replaced the carburetor with a new rebuilt unit. The transmission is a brand new ZF63A. I exchanged transmissions between the engines and the problems persists. I checked the exhaust for blockage and can't find any, the manifolds and elbows are new. I also put a vacuum gauge on it and the manifold vacuum is constant at 21, it will not drop indicating and exhaust blockage and it does not increase to suggest and intake blockage. I switched between fuel tanks and no change.The fuel is fresh, Did a compression check on the engine (twice) and all cylinders have 140psi. I am getting a rattle noise in the transmission so I replaced the damper plate with a new one and the noise continues at low RPMs, goes away after 1200 RPM (probably torsional vibration from the engine) it also shifts very hard, in comparison with the other engine. I have also check the linkage cables and they open the carburetor fully.
The only thing I haven't changed is the alternator, which is brand new, not sure if that can cause the lack of power, it shows that its charging 14v.
I am pretty sure that I have listed everything I have done, I have been trying to get this engine to run for about a month now and I am just out of ideas.
I would appreciate any help I can get on this.