Prop Help 15 1/2' True Tunnel 150HP Merc

[moomba]

I Have a 1973 15 1/2' True tunnel and need help finding a prop for it. I believe the weight rigged without the motor is around 500 lbs. It has 2 15gallon side saddle fuel tanks.

The Motor is a 1988 Merc 135HP 2.0. I have made some mods and should be about 150HP now. I have raised compression to 138-140lbs, bumped timing to 24 Deg, Glass reeds, 200 tuner and WH29 Carbs. and removed the oil injection. It has a Bobs Cone and lower PU. Gear is 1.78 1 .Have a land and sea transom jack. Any and all help would be great. Thanks

[wideglide55]

I'd try a 26 Cleaver first to see if it will pull it,don't want a chopper till you know how much lift the hull gives when running hard, be careful with the trim button at first it could become an airplane if you aint careful.

[moomba]

The guy I bought it from had a 245HP FI Bridgeport on it. He had a 6" set back plate on it and said it went better bolted to the transom with the Land&Sea Transom jack. He owned the boat back in the 70s with a power of tower on it and also a 200 HP Black max with no transom jack. Claimed it never got flighty he was always balls to the walls. He owned the boat twice for a total of about 20 yrs. Thanks for the info.

[wideglide55]

Proping it will depend on how much bow lift the hull provides at speed,if it doesn't have enough natural lift then a chopper prop is in order. Try a 26 chopper and see how it runs,dont be skeered let r eat.

[moomba]

Still waiting for ice out. Won't be able to try for another 3 or 4 weeks. I will try a 26 chopper and give some feedback. Anyone else with ideas?
Thanks again Terry