2013 Searay Sundeck 220 Won't Accelerate past 2500rpm 10mph in Lake Taho

[ChinoTrojan]

I'm up hear in Lake Tahoe and my 2013 Searay Sundeck with 5.0 MPI ECT Bravo III Sterndrive won't accelerate past 2500 rpm and about 10mph.

I normally use it in southern California. Used it Father's Day weekend 3 weeks ago in Lake Mohave and it worked beautifully.

Any idea what the problem could be? No warnings on the smart craft gauge.

I have read that prop pitch can affect performance, but I was expecting to lose about 10mph in performance, not more than 30mph of top speed.

When I rev the engine without the prop engaged, it revs normally to 5000rpm. Any ideas would greatly be appreciated.

 

[techmitch]

I'm up hear in Lake Tahoe and my 2013 Searay Sundeck with 5.0 MPI ECT Bravo III Sterndrive won't accelerate past 2500 rpm and about 10mph.

I normally use it in southern California. Used it Father's Day weekend 3 weeks ago in Lake Mohave and it worked beautifully.

Any idea what the problem could be? No warnings on the smart craft gauge.

I have read that prop pitch can affect performance, but I was expecting to lose about 10mph in performance, not more than 30mph of top speed.

When I rev the engine without the prop engaged, it revs normally to 5000rpm. Any ideas would greatly be appreciated.

Altitude and drive ratio are the first things that come to mind.

 

[blaster]

Sounds like a combination of high altitude and weak ignition. Get a tune up and a lower pitch prop for Tahoe.

 

[Arminius]

6224 feet. Less O2 to burn and a rich mixture if the MPI doesn't have altitude compensation. I would talk to a local boater if at all possible. Experimenting with a 14" prop would be expensive. Could you please take a crap on Jane Fonda's deck while you are down there as I loved my 2-strokes. Wonder what she agreed to do in Klute when she said, "That will cost extra."

 

[Arminius]

Still, the tramp had gumption. Her heart was in the right place when she fought the War although she may have crossed a line. Hunting studs throughout the galaxy in her sex RV as Barbarella was special. Why plane, when you can enjoy the waterfront and its denizens?

 

[ChinoTrojan]

So an update to this, since the boat was new to me, I didn't actually know what prop size I had on the Bravo III. It turned out the previous owner was running a 13.75 x26, 3 blade RH and 15.25 x 26, 4-blade LH. In Searay's propeller chart, they state my 220 with the 5.0 MPI should have a 14.25 x 22.50 3 blaDe RH, and 15.75 x 22.50 4 blade LH.

I had tried to order one while in Tahoe, but I was not able to locate one. My dealership in Irvine is now looking for one. The props worked great at low altitude, and I am now curious how the appropriately sized props will work locally in Southern California.

The props on there are for a 26 foot SLX with the 8.2. LOL, big difference.

 

[Arminius]

SeaRay may list "high altitude" props as an option on your boat when it was new. They do for the SPX 190 I noted. You could duplicate that option with aftermarket props.

 

[ChinoTrojan]

Final update to this. Finally got the props that were back ordered in and installed. Tried it out a couple of weekends ago at Silverwood Lake in SoCal which is high altitude, though not as high as Tahoe. Boat worked beautifully.