300xs and 28 Skater
 

I am re-powering my 28 Skater with a new set of 300xs.Who here is currently running them.Are there any problems or issues with the 300xs?

Tired of the 2.5's? Sell them to Travis he will need some spares.

Sold the Good one and am in the process of parting out the blown one.I told Travis today to sell his 2.5`s and get 300xs:D

You Have An 2.5 Alien Cowl?????

yes, sent you a pm

I'd be very interested in your performance with those engines.

T2x

Steve i ran the new 30 in florida at the power boat trials with those motors were sweet .no issues that i have heard of yet but have not talked to any one with a lot of time on them yet. time will tell we have one being rigged out at skater for frank going to port charlotte should be mid april. will know more on them then good luck i think you will like them jim

300xs
 

I have 48hrs

12hrs over 6 grand the motors are awesome. fuel efficient durrable.

Only issue is that they start to shut down at 6150 and go into gaurdian at 6300. I would imagine with the 1.62 gear ratio you will run out of prop like me.


great engines.

Dan

What kind of speed @ 6,000?

Do these require 93 octane ?

91 min.

call the double r guys in canada.....they have set up acouple fast 28's with 300's

TOPS those were X motors not the XS motors.... and they weren't fast compared to some of the US 28 Skaters!

RT

Box Stock
 

Twin Modified motors( 2.5's and 300x) have pushed 28 Skaters over 125.

My question is where do the new XS motors stand in this comparison?

T2x

Dan,

I am going with 1.62 gear ratio, 14 1/2 x 32 cleaver 3 blades. When Jim was at at the Powerboat Mag test for the 30 skater, they ran 32s, but Jim & I are hoping we run out of prop and plan to try a 34.

Frank F.

300xs
 

My boat is runing 109 full of fuel or empty with 15x34 cleavers stock. I saw 112 on a flat calm day.


your boat easily will turn the 34's



The boat ran 118 with the 280's 116 everyday so I know more speed is in it.

dan

Dan So as of now the 300xs lost app.5mph compared to the 280ros ? Did the boat gain weight as a result of the pleasure conversation?

300xs
 

I have not weighed the boat. I don't think it is slower because I am on the rev limiters with the 34's. The motors stop making horsepower at 6100-6150 cylinders are flooded oil. The efficiency of the boat carry the boat to 6300 and the motors go into gaurdian mode.


If I had a set of 36 pitch props the boat would be faster.




Basically its going to be difficult with the 07 model year motors to see 120 mph with out custom props. I would bet that eventually mercury will increase the rpms on the motors as they get more time.

Dan I agree if your motors will pull the same speed empty or full. Horsepower is not the issue. Talk with BBlades about props. Maybe 4blades would help