I am assuming that you are talking about a 35 Bruno? If so you are very limit with propeller aperture and most likely a 1.5 shaft. Without doing a major drop shoe rudder & reshafting, I would look to find a 3208 375 HP with a 1.5 TD 507 gear. Or a 3126 CAT with a max of 420 and also a 1.5 gear. With the 1.5 gear your will max out on propeller size, plus the 1.5 shafting will be fine.
We did the boat with a 440 Yanmar 1.75 shafting & 1.77 gear. Swing a 21X20 propeller the boat ran like a rabbit, however it was a very costly repower.
Finding old reliable AKA the might 3208 TA is a very economical way to go. The 3208 is a very easy motor to work on, parts are plentiful and they run great. Keep the RPMs down to 2400 RPMs and the boat will give you years of loyal service.
Lastly I do believe those boats had a center steel fuel tank. Before you get to involved I would research the fuel system.
On the Yanmar Bruno we removed that rusty tank, made a fish box and was able to place two 100 gallon aluminum fuel tanks under the deck on both sides of the motor amidships. I also believe that placing the fuel weight of 1400 lbs. zeroed out the Yanmar weigh reduction of 1000 pounds. The boat sat real nice in the water and ran fairly flat at 19
Then I will stick to my thoughts on the CAT power w/1:5 gear. You can on a push use the 506TD it is rated for 350 HP & in running a 3208 @ 2400 RPMs you will be no where near that HP. Plus for the once & a while WOT you should be find. In addition the higher the reduction the stronger the gear. Meaning a 1:5 is much stronger that a 2.5:1.Yes... It's a 35
just put a iveco 270 in a 35 bruno it does 22 knots boat comes out of the water and planes its great ! running speed 17 - 18 looks like about 8 gallons an hour . if that helpsCan these boats do 16 knots cruising? Boat is empty with almost nothing in it....
Hull is solid glass.....
just put a iveco 270 in a 35 bruno it does 22 knots boat comes out of the water and planes its great ! running speed 17 - 18 looks like about 8 gallons an hour . if that helps
1998 5.9 I think , bought used so not sure . question:what should be max rpm for that motor? wide open im at 2900 rpm ad running about 2600 35 Bruno 24x 21 prop thanks also looking solenoid, motor wont shut off thanks could you price thanks ron 9789942401Is it the 5.9L Common Rail engine or the 6.7L Mechanical Bosch VE pump engine? Curious.
it was rigged for lobster, went 7 .5 knots I tuna fish this boat comes out of the water and planes im only burning about 8 gallons while running , more sea trails coming and ill know exeactly what im burning , but its not much 22 crows nest 22 pulpitthats amazing my 31 bhm has a 430cumming 6cta @17-18kts im in the 14-15gph range. i dont have my floscan 100% dialed in. Is your boat rigged for lobster?