Honda BF50

Fishstick

Seaman
Joined
Nov 2, 2008
Messages
56
I have a pre 97 honda BF50 5hp kicker motor.

I used this as a kicker on my old boat and it developed a problem of dying out at low idle speed. Ran fine at higher rpm's but would not idle down low enough to shift it in gear without shearing the pin. I sold the boat a short time later and the kicker went into garage storage for the past three years.

Now have a new boat and brought the kicker out of storage. Drained replaced fluids. I had drained the carb before storage. New tank and fuel and she fire up on the first pull but the idle issue remains. The carb looks fairly simple and I'm wondering if a sticky/worn float valve would manifest itself in such way. Also found that the motor would rev up on its own without touching anything.......would not hold a steady RPM.

I'd also like to replace the impeller/water pump as it has been in storage for so long. Would this require special tools and a job best left for a tech or something I can do? I have done this job on an 80hp evinrude, but no experience with tearing into the Honda. It looks like two bolts hold the lower unit on and I'm assuming you need to unbolt the shift linkage through the access port in order to drop the unit to access the impeller. Am I missing anything or way off base?

I've ordered a service manual for it but it won't be in for a couple of weeks. Got some free time on my hands next week. Can't find an online downloadable service manual for this motor.

Respects
 

Karl_Childers

Petty Officer 2nd Class
Joined
Mar 2, 2009
Messages
118
Re: Honda BF50

yep, sounds like a dirty carb to me. Be careful getting the lower unit back in there. can be kinda tricky to line the water pump up. otherwise, Piece O cake
 

cbryder

Recruit
Joined
May 10, 2009
Messages
4
Re: Honda BF50

I had similar issues with a 1983 Honda 7.5 I just picked up. It had been sitting around in a friend's garage for quite some time. Couldn't get it to idle down properly. Picked up some carb cleaner (the type that you can soak parts in), disassembled the carb, soaked the parts for an hour or so, cleaned everything up with compressed air and reassembled it. Runs perfectly now. The carbs are fairly simple to disassemble. Just ensure that you don't use the carb cleaner on any of the non-metallic parts. Also, check the gasket between the carb and the intake manifold. Air leaks can cause idle problems.

Good luck. :)
 

Fishstick

Seaman
Joined
Nov 2, 2008
Messages
56
Re: Honda BF50

Thanks. I pulled the carb yesterday and will wring it out in the next day or so. Much appreciated.
 
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