Re: Stalling problems on a 75hp HOnda
Haven't the time to post the links, but look at some of my posts in this forum. I have had the same problem with my 90. I have found this problem is very noticeable on one particular prop (17" Merc prop) and partially noticebale on a 19 honda prop. It is not noticeable whatsoever on finer pitch props. I brought this problem to my dealer a couple of years ago when it happened occasionally on my 19" prop. He made a slight adjustment to something (not the idle) and the problem went away. It became a persistant problem immediately after a recent tune up (valves and carb sync on top of regualr servicing). However, I also switched props to the 17" Merc. I wondered if it had something to do with the restrictive adapter sleeve that is required for the merc prop on my Honda. <br />I haven't been to the mechanic since the problem reoccurred as I do not think it's serious and it's late in the year. I too agree it has nothing to do with engine temp. <br />From my years flying piston driven planes, I recall that engines would frequently bog down and die when firewalled from idle. This was most noticeable on variable pitch props when the pitch was set high or from regular props when the plane was heavily loaded. I suspect that the engine gulps to much air before the carb can deliver enough gas to make a combustable mixture. In other words, the engine cannot come up to speed fast enough (becasue of the load placed on it) in order to run properly on the mixture and timing it is currently at. This theory is backed up by the observation that the problem is more frequent (or at least more apt to happen) in colder air (like now - in the fall) when the air is denser. I'm sure it's a minor carb adjustment or similiar as, like I have stated, my mechanic knew right away what the problem was and made the appropriate adjustments.
