B75 Carb replacement/fix?

[erikgreen]

Hey, all;

As reported here a while ago I bought a used Honda B75 7.5 horsepower outboard for use as a kicker.

It had been sitting for 10 years according to the seller, and he gave me a really good price... which now makes me wonder if he know what was up with this thing.

I did some service on it today... compression good (150/140), spark, but no fuel. Opened up the carb to look and the lower part of the inside was solid corrosion (not sure what from.. it was the white stuff, like hard water scale).

I might be able to clean it and overhaul with a lot of luck, but frankly it looks like it might need a new carb.

Looking around it seems like these aren't available any more. Can anyone point me to a source for a new/reman carb?

Serial is B75-3005265

I can get some parts from sources online for a lot of $$$, but not the whole carb or even the specific parts that seem to have the most corrosion.. maybe I should just cut my losses and buy something else?

Thanks,
Erik

 

[joebob14]

Re: B75 Carb replacement/fix?

If I cant fix a part my first stop is always marinesurpluss.com. They have lots of used parts at resonable prices. Selection is limited but due to there prices they are always my first stop.

 

[erikgreen]

Re: B75 Carb replacement/fix?

I've decided after looking around that any new old stock carbs for this motor are basically nonexistant.

What I'm going to try is buying a new carb for either the same year 8 or 9.9 horse motor or maybe even a current generation carb and machining an adapter for it.

Looking at the other carbs for that year and the newer models, the major difference between models is the newer carbs mount horizontal. So a 90 degree elbow should be able to mount them correctly if I make the plates on either end match the carb and the old intake.

I think the motor is good, gears are good, etc. I just need a carb to make the thing run. It doesn't really matter if it's a little inefficient or gets less than full power. I want it to go 0-5 mph anyway.

I can get a new carb for $100 or so, and if the adapter works then I'm ok until I can afford a new motor. If it doesn't work I'll just keep my eye out for a good used B75 carb, or I'll sell the motor I have for parts. Either way I'll buy another motor when I find a decent one.

I've also been giving some thought to starting a new outboard motor company... I'd work it like SEI, using proven designs for the gearing setup and using commonly available 4 stroke water cooled small engines for the power unit. Sure, they'd be lower power to weight than the average Mercury, but they'd be a lot cheaper to repair.

Then I'd sell 'em for about half what the current crop of 4 strokes goes for, and make a mint.

It's nice to dream

Erik