Are some damper plates more reliable than others?

[Rowglide]

I am currently having my 4.236 remanufactured and same goes for the Velvet drive. I'd be a fool if I did nothing about the plate that joins the two.
are there "better" plates or are they all equally reliable.
I don't think I am interested in the R&D ones, just conventional spring plate. The entire engine has to come out to gain access to the transmission so what I install MUST be the absolute best quality.

Also, damper plates seem to be rated on Torque not HP. Anybody know the torque figures for the 4.236? I believe mine is supposed to be 85hp (according to original build sheet for boat).

Thanks

[boatpoker]

Originally Posted by Rowglide

I am currently having my 4.236 remanufactured and same goes for the Velvet drive. I'd be a fool if I did nothing about the plate that joins the two.
are there "better" plates or are they all equally reliable.
I don't think I am interested in the R&D ones, just conventional spring plate. The entire engine has to come out to gain access to the transmission so what I install MUST be the absolute best quality.

Also, damper plates seem to be rated on Torque not HP. Anybody know the torque figures for the 4.236? I believe mine is supposed to be 85hp (according to original build sheet for boat).

Thanks

Switched to R&D type 20yrs ago, won't go back to the 1940's spring type

[Captsteve53]

R & D have a great reputation = no springs!- these typically out last spring type by many years

You can fill in there on line selection tool here: R and D MARINE : Flexible Shaft Couplings

Cheers Steve

[Captsteve53]

Forgot your other question, Perkins 4326 develop 84 Hp @ 2800 RPM which delivers you the torgue rating of 157.6 ft/lbs

Cheers Steve

[Tugwit]

Originally Posted by boatpoker

Switched to R&D type 20yrs ago, won't go back to the 1940's spring type

I don't wish to hijack this thread, but I'd be interested in other experiences with R&D (or other spring-alternative) damper plates.

During a summer cruise two years ago, I had two springs break in my OEM damper plate (40 y.o. Fiskar Pisces/Isuzu 2AB1-Velvet Drive). As bits of spring lodged between the flywheel and its housing, the engine seized and stopped whenever engaged, and I was obliged to sail some 30 miles to the nearest marina for repairs.

Fortunately, I was able to quickly source a replacement plate at an Isuzu distributor, but there was no choice in the matter. The replacement plate was a Sachs, manufactured in Brazil, identical in appearance to the OEM plate. I have no idea as to its comparative quality; simply grateful to be able to get back on the water in a reasonable time. I did see the R&D product on-line, but it would have taken a month to source the appropriate replacement, so I went with the Sachs.

Frankly, if the replacement lasts 40 years like the OEM plate, it is unlikely that I'll be replacing it next time. Nevertheless, I'm intrigued by the R&D alternative product and would like to hear of others experience with it, or similar plates; in particular the performance at low RPM where the spring damper place exhibits considerable noise and rattles.

[boatpoker]

Originally Posted by Tugwit

I don't wish to hijack this thread, but I'd be interested in other experiences with R&D (or other spring-alternative) damper plates.

During a summer cruise two years ago, I had two springs break in my OEM damper plate (40 y.o. Fiskar Pisces/Isuzu 2AB1-Velvet Drive). As bits of spring lodged between the flywheel and its housing, the engine seized and stopped whenever engaged, and I was obliged to sail some 30 miles to the nearest marina for repairs.

Fortunately, I was able to quickly source a replacement plate at an Isuzu distributor, but there was no choice in the matter. The replacement plate was a Sachs, manufactured in Brazil, identical in appearance to the OEM plate. I have no idea as to its comparative quality; simply grateful to be able to get back on the water in a reasonable time. I did see the R&D product on-line, but it would have taken a month to source the appropriate replacement, so I went with the Sachs.

Frankly, if the replacement lasts 40 years like the OEM plate, it is unlikely that I'll be replacing it next time. Nevertheless, I'm intrigued by the R&D alternative product and would like to hear of others experience with it, or similar plates; in particular the performance at low RPM where the spring damper place exhibits considerable noise and rattles.

Absolutely no noise at low RPM, quieter, smoother shifts

[Siberian Sea]

I had drive plate problems too and I went for Shure Drive system out of Canada. It's basically a clone of the long proven Twin Disk dive plate. It's very common on commercial fishing boats in Alaska where I'm from. No springs, no moving parts to fail.

[Lancerbye]

When my original damper plate went south 4 years ago on one of my 4.236 Perkins I was surprised and a bit dismayed at what I found when I took the transmission off to check the damper plate. The plate was held on to the flywheel by a bunch of small machine screws, many had unscrewed and fallen off. The last hold outs got sheared off. The springs were half broken and some of the plate was falling apart. I decided that I wanted something more sturdy so I opted for an R&D with the heavy plate and the rubber shock absorption. I redid both engines with these and was very much impressed with the quality and sturdiness of the design. No rattles and even if the absorption material were to fail, the plate would still maintain drive, due to the heavy pins connecting the plate to the hub. I used heavier Grade 8 bolts with wire through heads. They will not become undone.

[Rowglide]

Originally Posted by Siberian Sea

I had drive plate problems too and I went for Shure Drive system out of Canada. It's basically a clone of the long proven Twin Disk dive plate. It's very common on commercial fishing boats in Alaska where I'm from. No springs, no moving parts to fail.

Do you have any info on the "Shure Drive" Plates? website maybe? I can't find any info on them though I have seen them referenced a few times

[Captsteve53]

Here you go NextWave Marine Systems Inc.

[Rowglide]

Got it, suredrive, not shure-drive
Thanks
More research...

[coastalexplorer]

Hello.

One more referral to Sure Drive.

Barbara Mark
NextWave Marine Systems Inc.,
5-3125 Van Horne Road,
Qualicum Beach, BC.
Canada V9K2R3
Tel: 250 752 1790
Fax: 250 752 2791
bmark@suredrivemarine.com


Plus IF you happen to have a 2000 series Volvo here is your answer.

[Rowglide]

Originally Posted by Captsteve53

Forgot your other question, Perkins 4326 develop 84 Hp @ 2800 RPM which delivers you the torgue rating of 157.6 ft/lbs

Cheers Steve

Thanks Steve,
is that torque at 2800? I want to find out my max torque value and what rpm it is produced at.

[NCboatrx]

Originally Posted by Rowglide

Thanks Steve,
is that torque at 2800? I want to find out my max torque value and what rpm it is produced at.

Max torque is developed at 1,800 RPM

[Rowglide]

Originally Posted by NCboatrx

Max torque is developed at 1,800 RPM

Thanks
Can you tell me what the ft-lbs are at 1800?