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Catalina/Capri 25/250 Sailor's Forums

General Sailing Forum

Where to attach flush kit? - Honda 8hp 4-stroke

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Lightnup
Master Marine Consultant

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USA
1016 Posts

Initially Posted - 05/11/2005 : 21:32:54

Here's a photo of the flush kit for my '97 Honda 8hp (BF8A) 4-stroke outboard. Can someone please tell me where it attaches to the motor? The local Honda dealer didn't know and had never seen one of these until I ordered it. An archive search brought up discussions (I think JimB517 and gnorgan both have this engine) but no clarity on just where it attaches. The Seloc "shop manual" has no mention of it. I'm beginning to think it's really an instrument from the local OB-GYN office.

Thanks,

Steve

Steve Madden
'87 WK #5668 "Lorica"
Fort Myers, FL

Edited by - Lightnup on 05/11/2005 21:33:38

Leon Sisson
Master Marine Consultant

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USA
1893 Posts

Response Posted - 05/11/2005 : 22:40:03

Steve,

I've used those for years on several Honda outboards. Under the cavitation plate, just behind the prop, you should have a thick little fin sort of thing sticking down. The back side of the fin is engine exhaust, and on the front you should see a screened cooling water intake.

Now if your outboard foot doesn't fit the description above, then that's not the flushing adapter for your motor.

The clips of the flush out adapter go up in the exhaust opening, and the rubber 'mouth' cups around the front of the water intake. Remember to keep the shifter in neutral while flushing!

-- Leon Sisson

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ClamBeach
Master Marine Consultant

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3072 Posts

Response Posted - 05/11/2005 : 23:14:31

Mine is like that except it has a 45 degree fitting for the hose attachment... so it clears the propeller hub. Keep that puppy screwed onto the hose when you're anywhere near the water, otherwise it will dive in for sure.

I put a short section (3' or so) of old garden hose on my flushing fitting and use that to attach to the main hose. Less likely to drop/lose it that way.

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Sloop Smitten
Master Marine Consultant

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USA
1181 Posts

Response Posted - 05/12/2005 : 10:12:49

Steve,
If you are trailering your boat each time you use it, the adapter is certainly an option. I know JimB and myself have both installed the flush kit described in the C25 technical tips and its is a lot easier to use if you are trying to flush your engine while in a slip. I have one of those adapters also and never figured out how to use it. Of course one of the first things I did when I purchased Utopia was install the internal flush.
Check it out:
http://www.catalina25-250.org/tech/tech25/tt028.html

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JimB517
Past Commodore

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USA
3285 Posts

Response Posted - 05/12/2005 : 10:45:19

that thing is a pain to use in the slip, you are hanging off the end trying to fit it on that little fin pointing down (the spring part clips in the exhaust port) without falling in.

I made the internal flush kit with all bronze parts from Home Depot for about $8.

One change I made is stainless hose clamps on all the fittings.

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Lightnup
Master Marine Consultant

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USA
1016 Posts

Response Posted - 05/12/2005 : 13:12:46

Thanks for the replies guys. At least now I know where it's supposed to attach but you're right Jim, I can't reach down there while in the slip.

Until I get up the energy to install the solution suggested in tech-tips, I'll have to motor over to a low dock in our marina, flush it and motor back, which sort of defeats the purpose but I guess is better than not flushing the outboard at all.

Steve

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Sloop Smitten
Master Marine Consultant

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USA
1181 Posts

Response Posted - 05/12/2005 : 17:35:24

Steve,
If you motor back to your dock, after you flush it, you might as well not flush it. The salt accumulates from the seawater standing still in the intake manifold. It does not accumulate when the engine is running. That channel in the intake manifold that routes to the pee-hole is only about an 1/8th inch wide. It doesn't take much to clog it up. And the passages through the thermostat are even smaller. If you can't reach it from above you might want to back into your slip until you can install the internal flush. Should be easy to reach then.
Joe

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The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.