BF25A with a serial number BAJS-10015XX
I got this motor used 7-8 years ago. It ran fine when I got it and I could pull start it easily with one hand while sitting in the back of the 16' tin boat.
It then sat in a barn enduring temperature extremes for 7 years with the occasional use from family. Different people have "worked" on it so I don't know exactly what was done. I took it out a few weeks ago and found the pull start is now a two handed job with a foot on the transom. We got it running but noticed the water stream out the back wasn't working, and the oil light stopped flickering. I took the lower unit off with help from posts here and found the water pump had eaten itself. I have the rebuild kit for that.
I have now tried to pull start it with the lower unit off and it is still incredibly hard to pull. I took the recoil rope assembly piece off. Manually turning the flywheel underneath is difficult. I put the pull start piece back on and took the spark plugs out. It was then super easy to pull. I also tried it with a spark plug in only one cylinder. It feels like each cylinder has equal compression. It makes me think there is too much compression now? Or there is a decompression valve that is stuck close? I ordered the Honda parts manual, but I'm hoping someone smarter has some ideas?
Also, I'm not in great shape, but I'm 6'1, 200+ lbs and under 40yrs old. I should be able to pull start this thing.
I got this motor used 7-8 years ago. It ran fine when I got it and I could pull start it easily with one hand while sitting in the back of the 16' tin boat.
It then sat in a barn enduring temperature extremes for 7 years with the occasional use from family. Different people have "worked" on it so I don't know exactly what was done. I took it out a few weeks ago and found the pull start is now a two handed job with a foot on the transom. We got it running but noticed the water stream out the back wasn't working, and the oil light stopped flickering. I took the lower unit off with help from posts here and found the water pump had eaten itself. I have the rebuild kit for that.
I have now tried to pull start it with the lower unit off and it is still incredibly hard to pull. I took the recoil rope assembly piece off. Manually turning the flywheel underneath is difficult. I put the pull start piece back on and took the spark plugs out. It was then super easy to pull. I also tried it with a spark plug in only one cylinder. It feels like each cylinder has equal compression. It makes me think there is too much compression now? Or there is a decompression valve that is stuck close? I ordered the Honda parts manual, but I'm hoping someone smarter has some ideas?
Also, I'm not in great shape, but I'm 6'1, 200+ lbs and under 40yrs old. I should be able to pull start this thing.