25 HP Yamaha in swim grid

[TNyeste]

I’m purchasing a Cutwater 30 with a 25 HP Yamaha outboard built into the swim grid. I’ve never seen one before and wonder if anyone else has the same set up?

 

[KlaassyC]

I’m purchasing a Cutwater 30 with a 25 HP Yamaha outboard built into the swim grid. I’ve never seen one before and wonder if anyone else has the same set up?

We have one on our C-28. Tied into our autopilot, works well for trolling. Does limit use of the swim grid though.

 

[TristenT]

We have one on our C-28. Tied into our autopilot, works well for trolling. Does limit use of the swim grid though.

could you post photos of your swim grid with the cut out for the 25hp motor?

 

[TNyeste]

Boat is being delivered end of week and I’ll post photos

 

[croakz]

Is your Cutwater 30 setup like this Ranger Tugs R31 with a Yamaha 25hp added to it?

2014 Ranger Tugs Ranger Tug R-31CB Anacortes, Washington - BananaBelt Boats & Yachts

Waiting For Moorage? Need Moorage? We Have On Land Moorage Available For You! Closest to the San Juans! Save Fuel and Get Where You Want To Go Sooner! VERY RARE ADDITION: 25hp YAMAHA OUTBOARD INTEGRATED INTO BOAT'S CONTROL AND STEERING SYSTEMS - perfect for trolling or a get-home...

www.bananabeltboats.com

I was also wondering how well this setup works.

 

[TNyeste]

That is exactly like the setup on the Cutwater 30 I’m buying. From what I was reading it appears the more weight you put on the back of the boat, the more it slows it down. I wonder if anyone has tried using the outboard to increase thrust at WOT. I’m not talking normal cruising but in emergency situation. I know on the sea trial it was making 3550 rpm and you had to have the trim tabs totally down. It would make 17 knots.

 

[KlaassyC]

could you post photos of your swim grid with the cut out for the 25hp motor?

 

[KlaassyC]

That is exactly like the setup on the Cutwater 30 I’m buying. From what I was reading it appears the more weight you put on the back of the boat, the more it slows it down. I wonder if anyone has tried using the outboard to increase thrust at WOT. I’m not talking normal cruising but in emergency situation. I know on the sea trial it was making 3550 rpm and you had to have the trim tabs totally down. It would make 17 knots.

I haven’t used the kicker to increase thrust, but the weight of the kicker, reinforced swim grid, fuel tank and rigging definitely impacts the ride. We can hit 22 knots under perfect conditions, but 17 is more realistic with full fuel and a cruising load. Our normal cruise speed at 2950 rpm is 13 - 15 knots.

 

[TNyeste]

I haven’t used the kicker to increase thrust, but the weight of the kicker, reinforced swim grid, fuel tank and rigging definitely impacts the ride. We can hit 22 knots under perfect conditions, but 17 is more realistic with full fuel and a cruising load. Our normal cruise speed at 2950 rpm is 13 - 15 knots.

Do you have a tender off the swim grid?

 

[Mike and Sarah]

Very interesting picture. Someone added a plate. And drop fins on the existing factory trim tabs. That should make up more than enough for the extra weight of motor, fuel tank and added support for the motor. If it’s like my R31 with that big of trim tabs and drop fins you could easily over trim at fast cruise speed. I can not run fast cruise with the tabs al the way down. It hurts fuel economy and speed . Also make sure you raise the tabs all the way at slow speeds as it also negatively affects speed and economy.

I like your setup KlaassyC

 

[MPischke]

this is a 2015 but I can't see that it could change much. Certainly takes up swim grid area and you have to have the kicker down before you can flip the stern seat to the rear ward facing position.

Good luck with the new boat
M

 

[MPischke]

Just reading part of your post, what horsepower Volvo does you boat have? Mine is the 435 HP, the previous owner had the prop repitched and the boat can reach 26.5 Knots at 3300 rpm (sounded like the prop was not the correct match for the D6 435) doesn't seem to matter much as long as the tabs are about 50% down to reach the top speed.
You may want to investigate your prop pitch.
M

 

[TNyeste]

Just reading part of your post, what horsepower Volvo does you boat have? Mine is the 435 HP, the previous owner had the prop repitched and the boat can reach 26.5 Knots at 3300 rpm (sounded like the prop was not the correct match for the D6 435) doesn't seem to matter much as long as the tabs are about 50% down to reach the top speed.
You may want to investigate your prop pitch.
M

The boat has a D6-370 engine. Running a 4 blade prop

 

[croakz]

For those with these add on outboards, how big is the gas tank? How fast does a 25HP move a Cutwater 30 or a Ranger Tugs R31?

 

[watson1987]

I'm curious where the gas tank is, and if that means a blower is in the diesel engine compartment too!

 

[TNyeste]

For those with these add on outboards, how big is the gas tank? How fast does a 25HP move a Cutwater 30 or a Ranger Tugs R31?

Getting it next Thursday. I’ll let you know

 

[TNyeste]

I'm curious where the gas tank is, and if that means a blower is in the diesel engine compartment too!

I'm curious where the gas tank is, and if that means a blower is in the diesel engine compartment too!

I’ll look Thursday if nobody replies.

 

[Eachtra 27]

This was from my 2013 R25SC. 25 Litre Fuel tank was in the metal box on the swim grid.

 

[MPischke]

I'm curious where the gas tank is, and if that means a blower is in the diesel engine compartment too!

Gas tank is in the main engine compartment and is vented through the gunnel No blower in the main engine compartment as the gasoline engine is on the swim platform. tank holds about 50 liters.