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I plan to tow the 150 Montauk mostly on I-5 in the Seattle area. Occasional rain etc is a concern for adequate stopping.

My 2018 Subaru Outback Touring model with 3.6L engine has a gross vehicle weight of 4850 lb.

WA state requires brakes if loaded trailer weight is greater that 40 % of GVW which calculates to 1940 Lb.

A Karavan trailer suitable for the whaler is model KDB - 1500 - 71. It weighs 410 lbs.

Boston Whaler lists the 150 Montauk as 1390lb with motor and fuel. This plus trailer is 1800lb.

At this point there is a 140 lb margin. Add the fishing package (cooler and rod holders) an anchor and a spare gallon or two of fuel and the 140 lbs is mostly eaten up. So on a rain slick highway I would right at the legal limit and relying on the Subaru brakes alone.

Many Outback owners use a Tow-Pro brake controller, made in Australia, and it works well for them. It senses deceleration of vehicle and applies proportional braking and can be adjusted.....I have to rely on the experience of others here.

So, BW offers a trailer for the 150 Montauk with disc brakes. If I can afford the $30k + for the boat I can afford the peace of mind I get with disc brakes. I wonder about rinsing these after salt water immersion. They will be much easier to rinse than drum brakes with shoes would be.

Thanks for the insightful comments