Reed Stoppers

**phillnjack** · 01-19-2018, 02:37 PM

on mine they are on both sides, I only have a omc 56 .. both sides are the same on this.

**ChrisCarsonMarine** · 01-19-2018, 02:52 PM

Originally Posted by phillnjack

on mine they are on both sides, I only have a omc 56 .. both sides are the same on this.

Interesting,Iv'e done mostly v4 and v6's,some have one on the long side,some don't...never seen one with one on both sides,Chris

**Steve Pope** · 01-19-2018, 02:53 PM

I was on the understanding that the " reed stopper" was not intended to limit reed opening but acts as a damper.???

**Dave S** · 01-19-2018, 04:05 PM

In the old ...dazzz,,,kg9 mk 20 had the crank spinning past the reeds. Need a stop. Or crank got in a game of hittman ... Later L6 had stops but 2 different styles. one had a break point the other had a smoth tranisiliton. Sorry for sp/, old motors need stops......

**phillnjack** · 01-19-2018, 04:08 PM

This is what mine look like
1 complete reed cage and one set apart ..
showing 2 reed leafs and 2 shims and 2 stops and 1 empty cage.

these are what the omc 3 cylinder 56 reeds are like on 1995 oval port, from part no its the same on all the 56 motors
reeds are same length and so are the stops.

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Click image for larger version.

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**FMP** · 01-19-2018, 04:14 PM

The good five panel Chryslers from the 70s are the same style with the curve stop and shim strip. When using aftermarket reeds the stop not used , the strip is. No issues at all doing this except a gain in rpm, for this application. About 2.8+ square inches for the later Force five panel.

**Dave S** · 01-19-2018, 04:50 PM

Shimm used a breck point.

**phillnjack** · 01-19-2018, 08:45 PM

" Shimm used a breck point "

what is that supposed to mean ?

**DanUmbarger** · 01-19-2018, 09:37 PM

Just got done putting my new CCM reeds in my Johnson 1975 135...it had no shims but did have stoppers which I reused while installing the new reeds. Is there a rhyme or reason on when the shims were used and when they were not? The only reason I changed the reeds is that I don't want to destroy a 42 year old engine by sucking a steel reed. Also my old reeds didn't have any of that weird staining shown in an earlier post.

**phillnjack** · 01-20-2018, 08:39 AM

are your 135 stoppers the ones with the 3 slots or the complete plates ?

**DanUmbarger** · 01-20-2018, 10:50 AM

My stoppers have the slots cut in them...although I have seen the solid plates before.

**phillnjack** · 01-20-2018, 11:20 AM

slotted stops are the original ones fitted to the 135.
with the original metal stops the reeds could no way get bent enough to cause metal fatigue.

newer reed material lets the reeds move more easily, but it would seem that modern materials dont last as long.
Or are these newer reeds only lasting a short time due to the motors being modified for a much higher rpm ?

if the rpm was kept down to say 6,000 to 6,500 rpm as per fishing motor, how long would newer type reeds last ?

**Mark75H** · 01-20-2018, 12:31 PM

Originally Posted by phillnjack

slotted stops are the original ones fitted to the 135.
with the original metal stops the reeds could no way get bent enough to cause metal fatigue.

newer reed material lets the reeds move more easily, but it would seem that modern materials dont last as long.
Or are these newer reeds only lasting a short time due to the motors being modified for a much higher rpm ?

if the rpm was kept down to say 6,000 to 6,500 rpm as per fishing motor, how long would newer type reeds last ?

Depends on the thickness and the epoxy base. Reeds with approximately the same tension as old steel reeds will last as long as steel reeds at fishing RPM. Go thinner, lighter tension and life reduces regardless of RPM.

**H2OPERF** · 01-20-2018, 01:06 PM

Just an opinion but i really don't like the solid plate stops for several reasons, A. they have to produce some kind of dampening effect as the volume on the back side between the reed and solid plate has no where to vent except the ends.. B. They have allot of oil/gas weted surface for them to stick to which you would think could slow the recoil on closing.. C. the intake charge drawn into the case between the petals is restricted.. Just my own theory but why i have never liked them..

**DanUmbarger** · 01-20-2018, 01:13 PM

I emailed Chris about what reeds to use and he recommended the 144R reeds. It appears they sell 3 different types...S, R and D...standard,race and drag. Now I'm curios how long these reeds will last and should I have gone with the "s" type. This is not going to be a race boat but I'm going to try to run this motor at the upper RPM limits...prolly 5800 - 6200 RPM.