in a previous thread i had asked about two 14 ft jons: one a 1448 (with center seat) with a newer (2001) 9.9 johnson manual tiller and an older (1994) 15 hp johnson with remote controls on a 1442 ncs jon.
as we discussed previously, the 15 hp seems to be weak; the 9.9 very strong in comparison.
again the 9.9 is a short shaft manual start tiller motor while the 15 is a long shaft, electric start, remote control version.
could one swap out the motors so as to put the more powerful 9.9 powerhead in place of the 15 hp motor?
this project would be assuming two issues. one is that no rebuit 15 hp powerheads were available and two, that the rebuilding of the old 15 might be cost prohibitive as compared to what is in question in this topic.
the possibility of someone overhauling the old 15 AND it becoming more powerful than the newer 9.9 exists. but there may be no assurance that the 15 would be more powerful.
as regards the 9.9's power, strickly by my observation, that it seemed as though it was a 20 hp the first time it's throttle was opened pushing the 1448 with a huge surge and leaping on plane in a couple of seconds... or so it seemed.
i reckon one would need the advice of someone that has done this before as i have no experience other than changing props on outboards. i can though, turn a wrench and would tackle the conversion once the details are learned.
one would want the 9.9 to have the amenities of the 15 considering the long shaft, electric start, and remote controls for use in a 1442 ncs alumacraft with a 20" transom.
the weak 15 hp motor's power head would then be inplace of the 9.9 in the short shaft motor.
doing all this would enable one to keep the more desireable ncs boat with the stronger motor and i would sell off the 1448 alumacraft jon with the conventional center seat and weaker but quieter "15" which i would sell as an older "9.9".
wistex
as we discussed previously, the 15 hp seems to be weak; the 9.9 very strong in comparison.
again the 9.9 is a short shaft manual start tiller motor while the 15 is a long shaft, electric start, remote control version.
could one swap out the motors so as to put the more powerful 9.9 powerhead in place of the 15 hp motor?
this project would be assuming two issues. one is that no rebuit 15 hp powerheads were available and two, that the rebuilding of the old 15 might be cost prohibitive as compared to what is in question in this topic.
the possibility of someone overhauling the old 15 AND it becoming more powerful than the newer 9.9 exists. but there may be no assurance that the 15 would be more powerful.
as regards the 9.9's power, strickly by my observation, that it seemed as though it was a 20 hp the first time it's throttle was opened pushing the 1448 with a huge surge and leaping on plane in a couple of seconds... or so it seemed.
i reckon one would need the advice of someone that has done this before as i have no experience other than changing props on outboards. i can though, turn a wrench and would tackle the conversion once the details are learned.
one would want the 9.9 to have the amenities of the 15 considering the long shaft, electric start, and remote controls for use in a 1442 ncs alumacraft with a 20" transom.
the weak 15 hp motor's power head would then be inplace of the 9.9 in the short shaft motor.
doing all this would enable one to keep the more desireable ncs boat with the stronger motor and i would sell off the 1448 alumacraft jon with the conventional center seat and weaker but quieter "15" which i would sell as an older "9.9".
wistex
