Honda BF150 / Merry Fisher 755

Very Annoyed

Very Annoyed

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Very excited about taking delivery of my new (to me) 2013 MF 755 which is currently having a long list of extra's fitted to it by the dealer (Morgan Marine) who I purchased it through

Powered by a Honda BF150 four-stroke which has a standard prop fitted. I've seen some MF's which have outboards with stainless steel props fitted I was wondering what the difference is between having a standard prop and a stainless prop and what difference it will make in terms of powering the boat?

Also is the Honda BF150 the same engine as the Honda BF175 but with a different map i.e de-tuned? Can it be remapped to the power of the 175?
 
Very nice boat!
I have the 645 with a Suzuki 115 and am well pleased with it.
Sorry, can't answer your question re mapping the Honda.
Does your boat come with trim tabs? I only ask as a 755 has turned up opposite me in the marina and that's fitted with a Suzuki 150 and that has had tabs retro fitted.
Happy cruising:-)
 
Very Annoyed said:
Very excited about taking delivery of my new (to me) 2013 MF 755 which is currently having a long list of extra's fitted to it by the dealer (Morgan Marine) who I purchased it through

Powered by a Honda BF150 four-stroke which has a standard prop fitted. I've seen some MF's which have outboards with stainless steel props fitted I was wondering what the difference is between having a standard prop and a stainless prop and what difference it will make in terms of powering the boat?

Also is the Honda BF150 the same engine as the Honda BF175 but with a different map i.e de-tuned? Can it be remapped to the power of the 175?
Click to expand...

After a 2 year sabbatical i plan to buy another boat next year. No more green lumps or sterndrives , just a plain vanilla and (hopefully simple ) outboard - most likely an MF 645 / 695 or Benny 6.80.

Good luck with the MF. May i ask - what boat did you have before.?
 
Oscar24 said:
Very nice boat!
I have the 645 with a Suzuki 115 and am well pleased with it.
Sorry, can't answer your question re mapping the Honda.
Does your boat come with trim tabs? I only ask as a 755 has turned up opposite me in the marina and that's fitted with a Suzuki 150 and that has had tabs retro fitted.
Happy cruising:-)
Click to expand...

Thanks for your reply,

Trim tabs are one of the long list of extra's that I'm fitting to it. They don't come as standard fit as far as I know?
 
I’ve always taken the position the stainless is best but if you boat in a place where you can easily ground the prop eg a river, then alu is best as it deforms more easily and saves the gearbox from taking all the shock
 
Hi, Congrats on the new boat. Honda BF150 is the top of the 115 135 150 4 cylinder series of engines, cannot power up any further until Honda do. BF175 is the low Hp version of the V6 range of motors going up to 250Hp. All Honda motors above 40Hp are supplied to dealer / boat builder Excluding prop, the Prop is then sourced to suit the installation. There is no hard and fast rule about any of the engines below 250Hp. The 250s all use stainless.
Hope this helps,
Enjoy. Springer.
 
springer said:
Hi, Congrats on the new boat. Honda BF150 is the top of the 115 135 150 4 cylinder series of engines, cannot power up any further until Honda do. BF175 is the low Hp version of the V6 range of motors going up to 250Hp. All Honda motors above 40Hp are supplied to dealer / boat builder Excluding prop, the Prop is then sourced to suit the installation. There is no hard and fast rule about any of the engines below 250Hp. The 250s all use stainless.
Hope this helps,
Enjoy. Springer.
Click to expand...

Thank you Springer that was very informative :encouragement:

Any idea what would be the best prop for that boat in terms of 3 or 4 blade, pitch etc??
 
springer said:
Hi, Congrats on the new boat. Honda BF150 is the top of the 115 135 150 4 cylinder series of engines, cannot power up any further until Honda do. BF175 is the low Hp version of the V6 range of motors going up to 250Hp. All Honda motors above 40Hp are supplied to dealer / boat builder Excluding prop, the Prop is then sourced to suit the installation. There is no hard and fast rule about any of the engines below 250Hp. The 250s all use stainless.
Hope this helps,
Enjoy. Springer.
Click to expand...
You could be right. When I bought my Honda BF150 I specced a ss prop but the dealer (in France) told me it’s standard on all Honda’s 150 and up but I never thought to ask if it was Honda or the dealers policy.
Anyhow the engine is perfect and the prop matches it perfectly. If I can find my old paper work I’ll be able to say what size prop it was. I do remember that it was labeled Honda
 
Bouba said:
You could be right. When I bought my Honda BF150 I specced a ss prop but the dealer (in France) told me it’s standard on all Honda’s 150 and up but I never thought to ask if it was Honda or the dealers policy.
Anyhow the engine is perfect and the prop matches it perfectly. If I can find my old paper work I’ll be able to say what size prop it was. I do remember that it was labeled Honda
Click to expand...

Bouba,
Thank you for your reply...:encouragement:

I spoke with a Honda dealer today in Liverpool he told me that Honda are the only manufacturer that don't supply a SS propeller on the 150hp what they do, do is give you the choice when you order the engine to swap the standard Ali prop for a SS prop. They then charge you the difference between the cost of the SS propeller and the supplied Ali Prop - if that makes sense?
 
I've just bought a new to me boat and had a long conversation with the chap that serviced it. He said that whilst a stainless prop may improve performance in some circumstances, the gearbox will last twice as long with any ally prop as the loads in use are significantly less.

Shoving from zero to 200 horsepower through a small gearbox in a matter of seconds with a heavy stainless prop I tend to agree...
 
Hot Property said:
I've just bought a new to me boat and had a long conversation with the chap that serviced it. He said that whilst a stainless prop may improve performance in some circumstances, the gearbox will last twice as long with any ally prop as the loads in use are significantly less.

Shoving from zero to 200 horsepower through a small gearbox in a matter of seconds with a heavy stainless prop I tend to agree...
Click to expand...

More significantly, if you are operating in shallow water, contact with the bottom will most probably bend a blade on an Ally prop.
Bottom contact with an SS prop can result in a perfect prop and a bent gearbox, which is not the cheaper result.
 
FlowerPower said:
More significantly, if you are operating in shallow water, contact with the bottom will most probably bend a blade on an Ally prop.
Bottom contact with an SS prop can result in a perfect prop and a bent gearbox, which is not the cheaper result.
Click to expand...

Agreed, when I last looked a bottom gearbox was around £3k☹
 
I disagree!
Almost every moderen propeller nowadays is fitted with a deformable core made of nylon or teflon. In the older motors it was a pin that broke if you hit your propeller ´so that it spins freely without making wedging the gearbox to an abrupt stop.
Irrespective if yours is fitted with a breakable pin or teflon core, these are designed to take the impact and giv so that your gearbox is spared .
As far as i am concerned , i have had numerous alu props and SS props, no difference at all in the life of the gearbox , neither over time or in the event of an impact.

example of it is in the link.
https://www.google.dk/url?sa=i&rct=...aw2WcOVMfeDWdf6W4Sua_8zs&ust=1514552942671856

If anybody has any data that says otherwise, i am interested in seeing it.

My 2 cents, go for a SS prop if you have have the cash.
 
Last edited:
benchmark said:
I disagree!
Almost every moderen propeller nowadays is fitted with a deformable core made of nylon or teflon. In the older motors it was a pin that broke if you hit your propeller ´so that it spins freely without making wedging the gearbox to an abrupt stop.
Irrespective if yours is fitted with a breakable pin or teflon core, these are designed to take the impact and giv so that your gearbox is spared .
As far as i am concerned , i have had numerous alu props and SS props, no difference at all in the life of the gearbox , neither over time or in the event of an impact.

example of it is in the link.
https://www.google.dk/url?sa=i&rct=...aw2WcOVMfeDWdf6W4Sua_8zs&ust=1514552942671856

If anybody has any data that says otherwise, i am interested in seeing it.

My 2 cents, go for a SS prop if you have have the cash.
Click to expand...

Agreed. That is exactly what happened when i ran aground in my first boat. The deformable core or plastic connector as i like to call it broke, prop spun freely, no damage to the gearbox and a cheap fix.
 
Thanks guys for all the replies they have been really helpful...:encouragement:

I was concerned about fitting a SS prop due to damage if I hit the bottom but 'Benchmarks' comments re the 'breakable pin or teflon core' has since given me new hope re fitting one! I'll speak with the dealer tomorrow.

What is the difference between fitting a 3 or 4 blade prop in terms of performance and fuel efficiency?
 
4 blade is generally better for initially getting up on the plane or for towing skiers etc but will have a lower top speed. 3 blade will give a better top end speed. I would go with 3 blade

Dennis
 
Thanks Dennis...:encouragement:

So in terms of fuel efficiency the four blade will be the winner, it will get me up on the plane quicker but the compromise will be top speed! What are we talking a few knots or 10 knots plus?
 
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