Hi Guys,
Recently purchased a used boat with a BF90, the boat had been kept on the water. Engine ran a little rough, so I booked it in for a full service/ health check.
Marine mechanic did a carbi rebuild and replaced parts - spark plugs, oil/fuel filter(s), water separator filter, impeller, anodes. Compression was good and engine was returned running nice and smooth. Mechanic mentioned he found some water in the fuel filters and pumped some more from the tank and to keep an eye on the external separator just in case it is an ongoing issue or had some left in the tank.
I took it out for a trial run did around a 60km day and the engine ran well didn't notice anything, besides it wasn't pissing water strongly which it never was, also at the end of the day the external separator had a very small amount of water in it.
The following morning I drained the very small layer of water out of the external separator, then at the ramp it was sputtering and wouldn't kick over. I persisted and tried everything pumping the bulb hard and using plenty of choke, as well as no choke. At one point I got it to kick-over although when it did it was idling rough, and it would only kick-over when tilted out of the water when I lowered the leg into the water the engine would cut out.
I returned home to try and diagnose, thinking possibly water in the fuel I drained carbies, drained fuel filter, external separator and pumped a few litres out of the tank via the bulb, no water in any of these areas. I couldn't get it started at all this time, ear muffs or no ear muffs. More sputtering without kicking over and some smoke too.
I'm not too experienced in working on Outboards, but would really like to get to the bottom of this after my investment so far.
Is it possible that water could have made it into the engine? As I didn't find any inside and there was a tiny amount in the external separator I'm assuming the separator was working? Any other ideas around what the cause could be would be greatly appreciated, thanks so much.
Recently purchased a used boat with a BF90, the boat had been kept on the water. Engine ran a little rough, so I booked it in for a full service/ health check.
Marine mechanic did a carbi rebuild and replaced parts - spark plugs, oil/fuel filter(s), water separator filter, impeller, anodes. Compression was good and engine was returned running nice and smooth. Mechanic mentioned he found some water in the fuel filters and pumped some more from the tank and to keep an eye on the external separator just in case it is an ongoing issue or had some left in the tank.
I took it out for a trial run did around a 60km day and the engine ran well didn't notice anything, besides it wasn't pissing water strongly which it never was, also at the end of the day the external separator had a very small amount of water in it.
The following morning I drained the very small layer of water out of the external separator, then at the ramp it was sputtering and wouldn't kick over. I persisted and tried everything pumping the bulb hard and using plenty of choke, as well as no choke. At one point I got it to kick-over although when it did it was idling rough, and it would only kick-over when tilted out of the water when I lowered the leg into the water the engine would cut out.
I returned home to try and diagnose, thinking possibly water in the fuel I drained carbies, drained fuel filter, external separator and pumped a few litres out of the tank via the bulb, no water in any of these areas. I couldn't get it started at all this time, ear muffs or no ear muffs. More sputtering without kicking over and some smoke too.
I'm not too experienced in working on Outboards, but would really like to get to the bottom of this after my investment so far.
Is it possible that water could have made it into the engine? As I didn't find any inside and there was a tiny amount in the external separator I'm assuming the separator was working? Any other ideas around what the cause could be would be greatly appreciated, thanks so much.