Deleted
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Post by Deleted on Jul 6, 2013 18:25:07 GMT -6
I have a 2004 22ft seapro with a 250 Evinrude my prop is 14.5 x22 comes out of hole good but up running say half throttle and go to give it more it cavitates or blows out I have to back off come down off plane and start over . My motor is a long shaft I bought the boat used I think the original owner put this prop on Any help would be appreciate Thanks Fisher
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Post by Juan on Jul 6, 2013 19:48:25 GMT -6
We could use a little more info:
How high is the motor on the transom? What rpms are you turning when running wide open? Does it blow out when you make a sharp turn? Is the motor trimmed all the way down when you're running and have the blow out problem or have you trimmed it up?
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Deleted
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Post by Deleted on Jul 6, 2013 21:37:33 GMT -6
The motor is dropped as far as it will go on the transom as far as Roma ill have to make a note in that and it will blow out on shape turns and it will do it with the motor trimmed down
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Post by Deleted on Jul 6, 2013 21:39:26 GMT -6
RMPS sorry
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Post by Deleted on Jul 6, 2013 23:00:53 GMT -6
RPMS I can't type tonight Lol
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Post by Juan on Jul 7, 2013 7:16:48 GMT -6
I'm guessing the prop you're running now is a 3 blade stainless steel? I'd think that a 22" pitch might be a little more pitch than you need for a 22' (Bay boat) but that may not be true...since you say it get's out of the hole good.. The higher pitch would give you lower rpms at WOT (wide open throttle) so we still really need to know what the rpms are when you're running wide open.
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BoutTime
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Location: Emerald Isle, N. C.
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Post by BoutTime on Jul 7, 2013 9:04:38 GMT -6
Every boat is different. I run a 14 3/4 X 19 (3 blade) on my 19' 190cc while that same prop will NOT work on my buddy's 19' Sea Pro bay boat.
The Evinrude website has a link to a page that you can input all your boat info and it will give you a couple of choices of props for how you use your boat. If that link isn't there - you can go to any prop manufacturer's website and do the same thing.
As for engine height the cavation plate should be approx. one inch below the lowest point of the transom while on the trailer or while running it should be at the water line.
Good luck with it.
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Post by Juan on Jul 7, 2013 13:50:21 GMT -6
Based on how you described the problem, at this point I would guess the prop may be the right prop but it sounds like the hub might be slipping. Does the engine rev up for no reason? Kind of feels like a clutch slipping?
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Deleted
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Post by Deleted on Jul 7, 2013 14:23:03 GMT -6
Yes that's one way to describe it but it usually on does it when I go to give it more throttle
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Post by Deleted on Jul 7, 2013 14:26:43 GMT -6
It does have trim tabs could I be using them wrong Ive had several boats this is the first boat I've ever had that has trim tabs
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Post by Juan on Jul 7, 2013 16:02:52 GMT -6
It does have trim tabs could I be using them wrong Ive had several boats this is the first boat I've ever had that has trim tabs I doubt it, but it's possible if you are trimming the tabs too far up.. keep them all the way down and see if it still blows out.. The prop hub could still be the culprit... they tend to slip when you give it more throttle and sometimes won't slip at lower rpms. |
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Deleted
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Post by Deleted on Jul 7, 2013 17:03:33 GMT -6
Thanks for your help Ill keep u posted
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Post by Deleted on Jul 14, 2013 8:50:05 GMT -6
Hey want to give everyone who helped me an update on my prop I took my prop to US propeller service in trout man nc they heated it and put more cup in it It runs great now full throttle trimmed up it runs around 5000 RPMS at 43 mph no blow outs Thank u all for your help. Anyone needing prop work call US PROP 704 528 9515. They charged me 45 dollars
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Post by Juan on Jul 14, 2013 11:09:20 GMT -6
Glad to hear ya got the problem solved....but I still think you should be turning more rpms at WOT..
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Post by Deleted on Jul 14, 2013 12:22:54 GMT -6
What do u think I should be turning ??
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Post by Juan on Jul 14, 2013 12:58:08 GMT -6
What do u think I should be turning ?? I'm not really sure about an Evinrude but Yamaha recommends between 5800 and 6000.. I'm guessing Evinrude is the same or close to it...maybe someone with a 250 rude will chime in. |
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Post by Juan on Jul 14, 2013 13:04:31 GMT -6
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Deleted
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Post by Deleted on Jul 14, 2013 16:25:38 GMT -6
Ok thanks. Does it hurt anything not to be turning any more RPMS I really don't care to run any faster
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Post by Juan on Jul 14, 2013 16:48:48 GMT -6
If you're happy with the performance, leave it alone, probably won't hurt a thing (but personally, I'd get it closer to where it should be). The lower rpms means the motor is working a little harder than designed and your mpg will be a little less than it could be if you were turning the recommended rpms. But to get in the right rpm range, you'd have to change that 22" pitch to about a 17". (1 inch of pitch will increase WOT RPM by 150 to 200 RPM)
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Deleted
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Post by Deleted on Jul 14, 2013 19:33:23 GMT -6
Ok thanks I may play with it a little and see what happens thank you for your help
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