I have a 2002 BF30A2 LHA that starts and idles just fine, but will not accelerate. It will only do maybe 30% of the total throttle. The power is steady and does not bog, surge, or die, it just stays steady at the lower throttle even when given 100% on the gas. The idle seems to be running rougher than normal.
Before this current issue, we had an old fuel issue so we cleaned out the portable tank, purged the lines, tested the primer bulb, rebuilt the carburetors, changed spark plugs and changed the filters. We only use ethanol-free gas with Stab-bil fuel stabilizer. It was working great after we did this and had full throttle.
Most recently the impeller in the water pump disintegrated so we cleaned all the pieces we could find, changed the impeller, pump liner, seal ring, and thermostat. We also back-flushed from the thermostat and nothing came out. The motor is peeing normally from the telltale, but the water doesn't feel as warm as it was before. The throttle problem started after the impeller change.
We thought the motor was going into "limp mode" to protect itself, so we checked all tubes and water flow. As I mentioned the motor shoots a steady stream out the pee-hole. Even when washing the boat, the pee-hole water is cold. We inspected the water flow again thinking there may be a blockage somewhere, but found nothing. We ordered a gasket for the water jacket to see if something is blocked in there. Not sure if something needs to be done to take the motor out of limp mode.
We did test and gap each spark plug. Not sure if related or not, but the top cylinder spark plug porcelain was whiter that the other two spark plugs, almost looked unused. Was thinking about testing ignition coils with a multimeter next.
Any ideas would be greatly appreciated.
Before this current issue, we had an old fuel issue so we cleaned out the portable tank, purged the lines, tested the primer bulb, rebuilt the carburetors, changed spark plugs and changed the filters. We only use ethanol-free gas with Stab-bil fuel stabilizer. It was working great after we did this and had full throttle.
Most recently the impeller in the water pump disintegrated so we cleaned all the pieces we could find, changed the impeller, pump liner, seal ring, and thermostat. We also back-flushed from the thermostat and nothing came out. The motor is peeing normally from the telltale, but the water doesn't feel as warm as it was before. The throttle problem started after the impeller change.
We thought the motor was going into "limp mode" to protect itself, so we checked all tubes and water flow. As I mentioned the motor shoots a steady stream out the pee-hole. Even when washing the boat, the pee-hole water is cold. We inspected the water flow again thinking there may be a blockage somewhere, but found nothing. We ordered a gasket for the water jacket to see if something is blocked in there. Not sure if something needs to be done to take the motor out of limp mode.
We did test and gap each spark plug. Not sure if related or not, but the top cylinder spark plug porcelain was whiter that the other two spark plugs, almost looked unused. Was thinking about testing ignition coils with a multimeter next.
Any ideas would be greatly appreciated.