steve palgreene
Well-Known Member
- Joined
- Dec 5, 2009
- Messages
- 96
Have a question on novarossi motor 21 outboard marine can you change sleeve & piston from one motor to the other or are the ports different .
Yes, It will still run. Nova purposely makes sleeves with more ports and sells them for more money, because under certain conditions they make more power.So if you put in a sleeve with more ports what does that do to the motor would it still run . Do you have to change anything In the rest of the motor.
Last I checked ( worked on a new Nova 21 OB last week) the case had the same 3 ports as Novas I have from 12 years ago.I would say no as the cases would be different I think? Contact Ron Shaw.
Brad
Not a Nova Guru for sure BUT, Over the years there have also been various crank strokes so that will also affect it. Some liners are larger in diameter also so they might not fit the case.Last I checked ( worked on a new Nova 21 OB last week) the case had the same 3 ports as Novas I have from 12 years ago.I would say no as the cases would be different I think? Contact Ron Shaw.
Brad
But the sleeve, I believe, had 7 transfer/boost ports and 3 exhaust ports.
However I think Nova may have made a rod length change in recent years. Therefore the case /port height in the newer engines may be different than the older Novas. You'll have to wait for a Nova guru to chime in.
Steve,So if you put in a sleeve with more ports what does that do to the motor would it still run . Do you have to change anything In the rest of the motor.
Thanks Brad. Glad to help anytime I can.There you go the parts supply man himself!! He will know and set you right.
Thanks for what you do for our hobby Ron!!
Brad
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