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  1999 VENTURA: Poor Performance On Plane

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Author Topic:   1999 VENTURA: Poor Performance On Plane
Owtdorsmn posted 02-18-2007 11:45 AM ET (US)   Profile for Owtdorsmn   Send Email to Owtdorsmn  
[This article about a 1999 Boston Whaler boat has been moved to the POST-CLASSIC discussion. The POST-CLASSIC discussion focuses on Boston Whaler boats which were first designed and produced after c.1990.--jimh]

[The author has a 1999 VENTURA of unspecified size with a] 135-HP Mercury OptiMax, a 10-HP four-stroker kicker, and a five-blade stainless propeller [of unspecified size]. I am used to my Crestliner which will jump up and plane in seconds. This boat seems to really dig deep and takes quite a bit longer [to get on plane]. Once on plane and the bow has dropped, if I back off on the throttle, the bow starts coming up and stern drops in. It then requires more throttle to keep it on plane. This can and has been a problem in heavy seas.

I have heard adding a [foil appendage to the engines anti-ventilation plate] or similar planing device to motor would help, as would planing tabs.

What have others done? This was my fathers boat.

jimh posted 02-18-2007 12:27 PM ET (US)     Profile for jimh  Send Email to jimh     
Please mention the size of the boat and the size of the propeller.

Time to plane is generally a function of the engine power. If the engine power is marginal, it can take a long time to reach plane. To improve the time to plane you can increase the engine power.

The choice of propeller can affect the time to plane. If you give more information about the current propeller we may be able to gain better understanding of the boat's current situation. Generally a propeller with a lower pitch will improve the time to plane at the cost of ultimate top speed.

sosmerc posted 02-18-2007 01:42 PM ET (US)     Profile for sosmerc  Send Email to sosmerc     
I have a similar package to yours...that is, if your Ventura is an 18.
I'd like to know what prop you are running and how many rpm's you can get at WOT. What load in the boat. Full fuel tank? Bimini Top Up? Dual batteries?
Glad to give you some advice, but need more details first.

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