Here’s the breakdown on weights for the 3 – 200 HP Yamaha motors.
Yamaha iFour 200 HP Weight = 489 (long shaft)
Yamaha HPDI 200 HP Weight = 475
Yamaha F200 200 HP Weight = 608 (long shaft)
As you can see the iFour is basically the same weight as the 200 HPDI. The original 200 Four Stroke from Yamaha, the F200, weighs 608 lbs. That’s basically the weight of an extra kicker hanging off the back of the boat and why you can run the new iFour on an MX1825 but the factory didn’t want to see the F200 on that same model.
Note, this has nothing to do with transom strength. Hulls are engineered to perform best with motors of a certain weight. Specifically the engineers build in “hook” at the trailing edge of the hull surface to provide enough lift to get the boat hull and motor up and out of the water to allow for good top end speed and handling. Adding additional hook to provide extra lift is always possible but at the cost of top end speed.
If the Skeeter engineers had designed the hull to perform best with the F200 which would have required additional hook to lift the heavier motor, anglers that chose the 150 option or a 200 HPDI or iFour 200 would have seen reduced top end speed.
This wouldn’t have made any sense knowing that the F200 was going to be phased out as an option for the walleye boat market. For this reason, knowing that the new iFour would weight about the same as the HPDI and much less than the F200, the engineers designed the MX1825 hull to perform best with the lighter motors.