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View Full Version : 04 x-star prop for a friend


djkslc
05-24-2010, 10:34 PM
A buddy has a 04 x-star with the 385 hp motor in it. We are boating about 5000 feet elevation and he is seriously disappointed with the lack of power when full of weight/people. The high elevation lakes he can barely plane with 10 to 12 people on board. His prop right now is (it was dark when we read these numbers, but i believe is) 13.7 x 15.5. Would the 14.25 x 14 prop be much of an improvement for him? I will try OJ tomorrow, just getting a head start on the question.

Jerseydave
05-25-2010, 08:02 PM
Eric @ OJ will give you the best advise, but here's what I've tried on mine.

'05 X-star MCX engine, sea level

stock 13.7 X 17 (no holeshot at all when boat is heavily loaded)
14.25 X 14.5 (great holeshot, engine revs are really high at wakeboard speed and engine hits the rev limiter at wide open throttle 37-38 mph)
14.75 X 15.5 (my favorite prop, great holeshot under heavy load and great top speed, 40-42 mph)

Keep in mind I am at sea level, so your results will be different. Your engine has more hp though, and IIRC the 6.0 likes high rpm's. In your case, I'd lean toward the 14.25 X 14.5 because of the high elevation.

Thrall
05-27-2010, 08:56 AM
I just put a Acme 1285, 14.5x14.25 on my X2 and ran it at about 6500'. With 4 adults and 4 kids in the boat and factory ballast full, it felt like getting pulled up behind my 190 LT-1 again (almost).
Prior to that the 13.7x17 struggled to get on plane pulling a boarder, same conditions.
New prop feels like it added back the hp lost at elevation and then some.
Won't be as dramatic improvement coming from a 15.5 pitch though.

EJ OJPROP
05-27-2010, 09:19 AM
Thrall - For your elevation I would suggest a 14.25 X 14