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Old 07-15-2019, 09:21 PM
TStell TStell is offline
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Join Date: Jul 2019
Boat: 2005 ProStar 209
Location: Southeast
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Angry Speed issues - HELP

Just purchased a 2005 209 ProStar. Has the 320 in it. Can’t seen to get spied out of it. GPS was reading 37. Got it up to 41 by cleaning bottom. Last owner must have let it sit in water. Reworked acme prop. 12.5 X 12V TC OJ (or maybe QJ)? Had a dealer put on computer and all systems seen good. Son is a barefooter. 41 is good but boat should be doing better I would think. Only 340 hours. Any thoughts? Need help.

Second issue which may tie to the first. After cleaning bottom it looks to have small “fish eye” type holes developing. Should I have it re gelled or painted? Any suggestions here would also be good. Looks like I may have been had by smaller dealer I bought boat from. Looked super clean at first and Speedo’s were way off so I thought I had plenty of speed.

HELP
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Old 07-15-2019, 10:14 PM
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JohnnyB JohnnyB is offline
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Tbi engine is 310hp

209 is a huge wetted surface...barely squeezing that speed out of my 197 with same prop

Might get 1 or 2 hp with prop change...contact O.J. or ACME props to get recommendations for your use

41mph might be a stretch....

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Old 07-15-2019, 11:51 PM
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mikeg205 mikeg205 is offline
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41 is good for a water sports tug... decent wake and lower speed wake boat...

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Old 07-16-2019, 07:49 AM
88 PS190 88 PS190 is online now
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Boat: 1988 MC Prostar 190, 351 Ford
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My approach.

Easy stuff, make sure it's waxed
Use < half a tank of fuel.
Bring 2 or 3 adults with and move them to the bow at full speed (safely) see if it goes faster as the boat gets weight forwards.

Talk with prop mfg and get their recommended one.

Check that at full throttle the arm on the throttle is all the way open. Slop and stretch sometimes rob you of some degree or two of top speed.

Check timing at full advance
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Old 07-16-2019, 07:56 AM
88 PS190 88 PS190 is online now
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Oh and have a tarp guy make you a snap in place bow cover preferably with some rigidity and not a lot of slack. That will make it so less air catches your bow seats and engine box
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Old 07-16-2019, 11:31 AM
CrashCourse316 CrashCourse316 is offline
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Quote:
Originally Posted by 88 PS190 View Post
Check that at full throttle the arm on the throttle is all the way open. Slop and stretch sometimes rob you of some degree or two of top speed.
Can probably find the manual for the engine to tell you the WOT rpm and make sure your getting there. then you can can adjust the cable a little if you aren't.
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Old 07-16-2019, 12:01 PM
88 PS190 88 PS190 is online now
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True but you can also just put throttle to stop with the engine off and then push on the linkage.

Used to see it a lot with PP boats where people didn't have the linkage installed well. And the ends in the throttle control will wear too.
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Old 07-16-2019, 12:02 PM
CrashCourse316 CrashCourse316 is offline
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Originally Posted by 88 PS190 View Post
True but you can also just put throttle to stop with the engine off and then push on the linkage.
^^good point. it's only tuesday my brain doesn't function until friday....I adjusted mine recently to have 0 slack at idle pos. gave me an extra 200 ish RPM from last year I was missing....on the downside that 200 more RPM of wasted gas......(-_-)
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Old 07-17-2019, 10:20 PM
TStell TStell is offline
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Join Date: Jul 2019
Boat: 2005 ProStar 209
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Thank you all for the tips. Both prop places said I should be running a 13 x 12. So I am going to try that and a few of the other tips here. Thanks. I will post again with any results!
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