870 Expressmag
Petty Officer 2nd Class
- Joined
- Sep 7, 2011
- Messages
- 154
The two motors im dealing with, 7.5hp blue stripe serial# 4554585 and 9.8hp red stripe serial# 2291925
ill try to make the long story short, helping a buddy get a motor going for the boat his grandma gave him. The boat came with the 7.5hp motor. The cdi box needs replaced due to brittle and broken wiring, I did manage to solder wires on to what’s left of the wiring and hook it up to the coils to verify spark, good spark so both coils are good, but needs cdi box. Also needs a carb kit, from what I can find he’s going to have somewhere close to $400 for these two parts. So he buys a used 9.8hp
the 9.8hp runs, we heard it run before purchasing, however it came with two incomplete lower units and a box of parts, he got it cheap enough so I told him I was sure I could figure it out. Yesterday I set to sorting it out, after a while I got to looking at the lower unit on the 7.5, looked identical so I dropped it out and installed in the 9.8, everything fit perfect. Wouldn’t shift to neutral but I think that’s because I didn’t have lower unit in neutral upon assembly. So today I dropped lower unit back out, rotated shift shaft and found neutral, so I should be good there. Checked water pump, vanes all broke off and laying in bottom of pump housing, cleaned it out and realized inside of lower pump housing has some damage that will ruin new impeller, so I remove it and grab the one that came with the 9.8, clean it up and it looks serviceable, go to install it and it won’t fully seat. They look identical, except the area below the main oring that fits down into lower unit housing, is a little longer on the one from the box of parts, than the one from the 7.5. Am I doing something wrong? I measured down to the bearing and it seems like there’s enough room. I looked up the water pump housing replacement kit for the 7.5 and it’s about $100, and it appears the Sierra replacement is NLA. Anyone have any ideas on what I can do to get one of these motors going for him?
ill try to make the long story short, helping a buddy get a motor going for the boat his grandma gave him. The boat came with the 7.5hp motor. The cdi box needs replaced due to brittle and broken wiring, I did manage to solder wires on to what’s left of the wiring and hook it up to the coils to verify spark, good spark so both coils are good, but needs cdi box. Also needs a carb kit, from what I can find he’s going to have somewhere close to $400 for these two parts. So he buys a used 9.8hp
the 9.8hp runs, we heard it run before purchasing, however it came with two incomplete lower units and a box of parts, he got it cheap enough so I told him I was sure I could figure it out. Yesterday I set to sorting it out, after a while I got to looking at the lower unit on the 7.5, looked identical so I dropped it out and installed in the 9.8, everything fit perfect. Wouldn’t shift to neutral but I think that’s because I didn’t have lower unit in neutral upon assembly. So today I dropped lower unit back out, rotated shift shaft and found neutral, so I should be good there. Checked water pump, vanes all broke off and laying in bottom of pump housing, cleaned it out and realized inside of lower pump housing has some damage that will ruin new impeller, so I remove it and grab the one that came with the 9.8, clean it up and it looks serviceable, go to install it and it won’t fully seat. They look identical, except the area below the main oring that fits down into lower unit housing, is a little longer on the one from the box of parts, than the one from the 7.5. Am I doing something wrong? I measured down to the bearing and it seems like there’s enough room. I looked up the water pump housing replacement kit for the 7.5 and it’s about $100, and it appears the Sierra replacement is NLA. Anyone have any ideas on what I can do to get one of these motors going for him?