4BY2 alarm information for others

K

knotflying

Well-known member
Joined
Jul 25, 2010
Messages
6,014
Fluid Motion Model
C-28
Hull Identification Number
FMLT2731J011
Non-Fluid Motion Model
25' Parker & 246 Robalo Cayman
Vessel Name
http://illusionsmikeandjess.blogspot.com
I had a warning alarm go off 3 times for the same problem and just wanted to let others no of this issue. The alarm itself is of no use because all it says on the read out is "check engine". When I was at Mac Boring getting my heater hoses replaced they put their computer on the engine and discovered that it was the hose that got disconnected from the waste gate. It has happened 3 times since and at least now I know what it is. The simple fix is to just reconnect the hose. This is located near where the air filter enters the intake and of course it is underneath everything so you kind of have to feel your way through it. The problem is twofold the tube (1/4 inch in size) has a very small barb to catch the hose, plus the clamp is one of those squeeze on clamps. The next time this happens I may put a little gasket shellack on the tube and use a screw clamp and tighten the hell out of it. Anyone else having this issue?
 
Haven't had that problem yet but I have filed it in the "just in case file". Thank you.

We did have an similar alarm go off earlier this year while we were on the Chesapeake Bay. It would not allow the boat to exceed 1200 RPM. We took it to the Yanmar people in Deltaville, Va., their OBD2 engine analyzer said there was a misfire in an injector. They erased the error code and everything went back to normal (except my wallet). I now have my own OBD2 analyzer and need to order an adapter for the 4BY2.
 
sportner":2hcf23gk said:
Haven't had that problem yet but I have filed it in the "just in case file". Thank you.

We did have an similar alarm go off earlier this year while we were on the Chesapeake Bay. It would not allow the boat to exceed 1200 RPM. We took it to the Yanmar people in Deltaville, Va., their OBD2 engine analyzer said there was a misfire in an injector. They erased the error code and everything went back to normal (except my wallet). I now have my own OBD2 analyzer and need to order an adapter for the 4BY2.
Click to expand...
Where do you get the adapter for the 4BY2?
Thanks
 
That little hose was always popping off, but no alarm; so I replaced it and put on very small hose clamps. No problem now. I took off the air filter to do the replacement.
 
I haven't got the adaptor for the OBD2 analyzer yet but I am sure it will come directly from Yanmar.

I just e-mailed Andrew with a request.
 
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