20' Bayliner Trophy with 120 HP

[8l88s8b8th]

We have recently purchased an older 1990 20' Bayliner Trophy with no power. Removed the 120 Force and thinking of 150 Merc/Yamaha but would like some input on how it runs with 120HP first.
Does anyone know what the speed & rpm are on running with a 120 hp?
Thanks for any input.

 

[ezmobee]

Re: 20' Bayliner Trophy with 120 HP

What's it rated for? A 120 sounds way underpowered for a 20'.

 

[Fireman431]

Re: 20' Bayliner Trophy with 120 HP

A Force 120 was one of the power options on the Bayliner Trophy models (both the center consoles and the W/A cuddy's), or the purchaser could have upgraded to the Merc 150. You didn't indicate which style hull you have. The W/A is heavier than the CC so performance will be hampered.

I had a 96 W/A Trophy with a Mercury 150 Saltwater series. I can't remember the pitch of the SS prop, so you may have to adjust your toward your liking. Without trimtabs, I was hitting a plan in about 4 seconds and topping out at 49-51 MPH (GPS reading), depending on whether I was with or against wind (5200-5300 RPM). I was cruising easy at 38 MPH @ 4200 RPM.

Everything I have read about the 120 Force put top end around 30-32 MPH with a cruising around 25. If you are planning to upgrade, my personal opinion is that it is certainly worth it.

 

[Cannondale]

Re: 20' Bayliner Trophy with 120 HP

What's it rated for? A 120 sounds way underpowered for a 20'.

Given that the 120hp was Force's highest output motor for 1990, it's not surprising that's all the Trophy had on it.....Bayliner could only use what they had available.

 

[Home Cookin']

Re: 20' Bayliner Trophy with 120 HP

I have a 21' center console with a 150; it's fine but sometimes I wish I had a little more; I would not want any less.

But.

Gas prices are more of a factor, so examine your use. if you are typically going solo or just one other person, and/or are not concerned about speed, going toward the smaller size would make more sense.

But.

ordinarily resale is irrelevant on what you do with a 20 year old boat, but if you repower with a new engine, you won't recapture that expense if you sell in the next several years b/c you will be selling an underpowered boat. Depends, then, on what you have in it already.

 

[444]

Re: 20' Bayliner Trophy with 120 HP

Most I have read about the OB bayliners with the force engines is a top speed of around 30mph. How much HP is your hull rated for?

 

[DuckHunterJon]

Re: 20' Bayliner Trophy with 120 HP

120 seems minimal on a 20' boat like that. My father's Triumph is 20', has a Yamaha 150, and tops out at 42 gps. I'm not sure, but I would think the Trophy would be a heavier boat than a Triumph.

Money aside (yeah, like that's really possible), I think you would be very happy with the upgrade for many reasons (performance, reliability, gas mileage, etc).

 

[DKVNY]

Re: 20' Bayliner Trophy with 120 HP

Any idea what the GPH is on this motor??? I know the rule is 10 per Hp/Hr...but I think it's more thirsty than that...

I'm asking because I'm using a '97 WA with the Force 120 (and I'm thinking I'm blowing thru fuel way to quick...it looks like about 25-30 GPH!!!