O-rings have a standardized (AS568) numbering system
The old o-rings were quite deformed like flattened donuts so any measurement of those would not give me the correct reading. My o-rings are likely metric. The chart you pointed me to are US sizes, simply converted to metric, so am not convinced the chart would work for me.
My carb seems to have a different configuration from these parts diagrams. These diagrams I think show a later model of the carb that did not have a priming line and bulb hooked up to the carb.Have you had a chance to search over your engine model parts diagram to see you could locate them?
Thinking either it’s in here,
Or here, https://www.mercruiserparts.com/bam/subassembly/28341/10750/90
And if not here’s your complete parts catalog, https://www.mercruiserparts.com/8-4-stroke-209cc-0p325500-up
Maybe try posting a few photos of what you’re describing to see if it may help any…
Here are a couple of photos - I did hear back from Mercury -the part I am looking for is 898103224, which shows up on the diagrams you posted. However, I cannot find the configuration of my carb that has the priming bulb and hose configuration. Is there any way to find out the size of these o-rings given the Merc part number?
ISO cross-sectional diameters differ from the Aerospace Standard (AS568) by less than 0.001 inch. Many/most AS568B sizes are interchangeable with an ISO size.
Unfortunately, my o-rings now look like discs with a hole in the center. They have completely lost their circular cross section. For what is worth, disc diameter is 0.317" (7.98 mm), hole diameter is 0.141" (3.53 mm) and disc thickness is 0.053" (1.35 mm). I do not have the "as installed" measurements. That is what I am trying to find out so I can source something. Local dealer does not have any of these o-rings in stock.ISO cross-sectional diameters differ from the Aerospace Standard (AS568) by less than 0.001 inch. Many/most AS568B sizes are interchangeable with an ISO size.
O-rings can and do distort overtime but your o-rings are obviously still in good enough condition to make an educated guess.
What is the cross section of the cord and OD of the o-rings as installed?
Fluent in both "metric" or "imperial" units
You may want to check your measurement conversions on the "disk" and "hole" dimensions.....
Sorry I'm a few days late. I like dealing with the parts thingies
ENG: 0R126144 1F10201FK MERCURY 9.9 M 4 "2006" |
I heard back from Mercury - the part number for the carb I have appears to be 8M0176126, but I cannot find a schematic on their on-line parts catalog. They said the carb has been superceded several times over the years. Parts 44 and 29 you took from the schematics of the carbs from their on-line parts catalog have the same part number (898103224) which is the number Mercury provided to me. They declined to provide the dimensions/specifications of the o-ring unfortunately.
The measurements I took of the old o-rings are correct. The problem is - the o-ring no longer looks like an o-ring. I assume over time it lost its elasticity and torus shape and became disc-shaped. The thickness of the disc actually equates to the distance between the bottom plate on the carb and the carb body.
Are you doing all this to save 14 bucks cdn by not ordering the tohatsu,or merc o-rings? I get it they're expensive for a wee oring but simetimes you got to suck it up and clear up the headspace.
Nope, just would like to know the size. Have taken the motor into a merc dealer to clean the carb and generally check out the engine. Lots of minor issues that I hope he can clear up, most of them associated with the carb. Pricing is weird though - spent $38 on a liter of gear oil for the lower unit last fall - same oil and brand at Cdn Tire this spring - $20.
The canadian retail for quicksilver premium gearlube is about 25.00 now. I think high perf is around 33.00
