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06 honda 150 performance

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jimmygouge

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I converted from 4.3 / volvo od to a full bracketed 06 Honda 150. Boat is a 19' enclosed cabin heavy duty Seasport \150 is pushing about 4000 lbs. I am working on weight distribution, needs more up in the bow (has 2 bags of sand, 160 lbs). At 3200 rpm it is planing at 30 mph (per Garmin 4008 gps w/ GS22 w/ P66 transducer) That speed in the North Puget Sound is fine.

My question -- Does that seem to be OK for the 150, is it under-reving or just working comfortably. I have a 3 blade SS 15 1/2 x 17, would a change of this existing prop bring up the rpm"s and give better performance (or not) and is that necessary.

Love this old boat, just nice getting it wet and what appears to be dependable. I'll take it for a run up north for a day or so once I get some opinions for the folks here.

Thanks for all the help
Jimmy
 
I have the same motor, and I push 4000 rpms to cruise at 30 mph. Top end is 43 mph at 6100 rpm, and the boat is a 20 center console. I'm less than 4K lbs so very surprised about your numbers but I would take that performance!
 
Thanks for getting back to me----- I know just enough to be dangerous. The more I read it seems that higher rpm's on a heavy boat and then the 30mph speed would be ideal. I dont want to lug it (overheat) There are a few prop calculators that dont seem to list anything for my combo. If it was a car I'd love the rpms.
 
Hope this video link works. The gps speed was crowding right at 30 mph, the rpms were per honda tach about 4000 rpms. What size prop would your recommend that I try to get more r's but stay close to the same speed.

 
I think you are underpowered, you have removed V6 of about 220hp and much higher torque than your 150. You can try a 13 pitch but there is no real fix for inadequate power.
 
I made a simple but stupid mistake. On the back of my new Honda tach, I put it on the 8 cyl setting instead of the 4 cyl , I am out of the water now waiting for my moorage to be available in a few days, I will then check out my gps speed compared to my instrument reading. If my previous gps speed is correct my correct tach will be 7500 or so. So what do you think my new prop should be or should I just slow down and cruise at 25 mph or so.
You really helped me with your responce
Thanks so much----
 
its a 37253-zw5-010a- black w/ hour meter. 4 wires- ground/black, light-red w/ white stripe, ignition - black w/ yellow stripe , sender - grey. The hour meter function works great and is accurate.

The motor is a 2006 150 , the last year with a 2 lite warining function, but i hooked it up with a 4 lite bundle sent by mistake by boats.net. the red lite is not a malfunction lite , it is always on and in 2006 and before you worry when it goes out. Just thought I'd throw that in.

Hoping the adjustment to 4cyl on the back side will make it read properly.

Again thanks for help
 
Your setting is now correct,2P/4Cyl. Now see what RPM you are achieving at full throttle on the water, not by speed/rpm calculations, and let me know what it is getting.
 
Hi I'm back;
I adjusted the tach and took the boat out today.
--to get out of the hole I put both trim tabs all the way down, boat gets up on plane quickly. I did not raise the tabs, left them down. Not sure what effect leveling out the tabs would have done, but after 3 runs from dead still to full on the motor held between 4500 and 4900 rpm with gps speed averaging 25 mph. It feels comfortable at 25mph , next time out later this week I'll bring the tabs up and see what that does.
Thanks for your help
 
If that was WOT it sounds quite overpropped - but don't know what effect potentially being underpowered would have.
I have a 21' Boston Whaler with a dry hull weight of 2700lbs...... I run a 225 and couldn't imagine a 150 on it.
(And just for reference I cruise at a gps speed of 23mph at 3500rpm with one person and 3/4 tank of fuel with a 17" pitch prop).

My feeling is that the cruising range on my engine is between 3500 and 4000 RPM, - if so, your engine may be working fairly hard.
Will your boat plane below 4000rpm?

Lifting the tabs once planning will increase the speed
 
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I see from the Sea Sport web site that the 22' (4200lbs) gets about 25mph at 4000rpm from a 250, so I think that ideally you'd be running a 200.
 
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