SangamonRiverRats: the difference between a 9.9 and 15 are the carb, reed stops and cages, and the exhaust .. also you need to reprop the motor to take advantage of the extra 1000rpm's you are going to have ... you know nothing sir.
justame smith: I have an 81 9.9hp Johnson. I checked on ebay. Cant find 15hp carbs. Any suggestions? Thanks
Danny Boggs: this guy has crap for brains.he is a liar.please folks ---move on very fast NOW
Outboard Fun: The 15hp has turned exhaust pipe that the 9.9 does not have so you aren't getting it to 15hp with out changing the turn pipe. you may 11or 12hp You would do better to change the exhaust pipe on the 9.9hp.
iwantosavemoney: I think this one already had a 15hp carb on it
vojomatusenko: Olhippie1 is right just as boatsandairsoft.
olhippie1: Once and for all...It is absolutely true that the carb is the only difference between the 9.9 and 15 h.p. '76 model Johnson outboard!
MetalTeamster: exhaust was diff on 15s....
chargerkid2011: Is this motor pretty reliable? Im getting ready to purchase the same motor
Ferdinand den Bleker: awsome! Do you think I can do the same with my 9,9 hp from 1975, and my 15 hp from 1976? Someone gave me the 15 hp but I'm not sure if I can get it fixed so I was thinking about switching the carb. Is there really nothing else you have to change? Not even the exhaust or the ignition?
greatings from Ferdinand (from the Netherlands)
wiliam sullivan: Great job. Laugh at the negative comments. Talkers are always talking about doers.
orignalbuckaroo: I think you're right, beside, the 76 still had points and condenser!!
Electronic started in 77, then we started to have real prop horse power which made a huge difference in the speed !! TNX for the comment!! :)
bsrktm1: I'll take the bet and your money. A 9.9 is a restricted 15. Same block, crank, rods, porting, compression, reed block- Does it make sense from a manufacturing standpoint to change all that? Carb IS THE ONLY difference in 1976. Reed shims (they add VIRTUALLY no Hp), and tuned exhaust were added to later 15s to get a full 15 PROP horsepower. 15s also were rated at 1000 higher RPM.
bsrktm1: In 1976, the ONLY difference between a 9.9 and 15 was the carb. It has a larger venturi and bigger jets than the 9.9. The 9.9 is a restricted 15. Later models added the tuned exhaust to get a full 15 prop rated Hp. Early (before about 1980) models were flywheel rated.
orignalbuckaroo: Nope, not only the carb !! To do this job correctly, he needs to change the exaust tube as well, if not, the engines wont have full performance and it will be darn hard on gas !!!
SaugaImports Garage: ebay
Jaden Crochet: Great video and where did you get the 15hp carb?
leon karras: exw mia johnson 9-9hp toy 1984 mporw na th kanw 15 mono me ydatanthrakes h tha xreiastw k exatmish??????
putsstuff: He is not an idiot he is right the 2 blocks are identical only the carb was the difference
Fauerbachbrewery: good work and good camera work.
How to turn a 1976 9.9hp Johnson to a 15hp(Carb Exchange)5
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