Merc prop interchangeability

[dicktaber]

I'm hoping a Merc expert knows this one. Is the prop shaft on all inline sixes the same? i.e., can I buy a prop that came off a 63 100HP and put it on my 82 115HP (assuming correct pitch)? How about the V-6? Same shaft? I keep seeing props for sale that "came off" such-and-so engine and I don't know if they will work on mine. Made one boo-boo already and bought a brass prop on eBay that "came off" a model 800 (80 HP, 15 pitch). Seller stated that it would fit, but...when I open the box, it's CCW rotation...that won't work! What will this thing fit--I'd like to put it back on eBay but don't want to stick somebody else with something they can't use, so I want to say exactly what it will work on. Any comments on 2-blade, 3-blade, 4-and 5-blade?

 

[dicktaber]

Re: Merc prop interchangeability

Help....please?

 

[trevorcday]

Re: Merc prop interchangeability

I believe that the inline 6's all take the same prop. It will also be the same as the current 75/90/115/125 prop. They will be approximately 13.75 dia. +/-. The V6 motors take a bigger prop that is shared with the stern drives these are generally 14" dia. and larger. There were a couple of V6 models made with the smaller gearcase that took the smaller prop. but these are the exception. The difference is in the bullet (gear housing) diameter.<br /><br />The LH prop you got on ebay would be intended for a counter-rotation motor in a dual installation.