Failed Shaft/Flywheel Splines

[LngTmSlr]

I have a 1992 Beneteau First 310 with 1750 hours on a 2000 series Volvo Penta engine and transmission. While motoring steadily at a moderate speed, the boat suddenly slowed and there was a Rrrrrr sound. Long story short, the spline teeth in the flywheel adapter failed completely. The splines on the transmission shaft were worn down several thousandths and some were triangle shaped. A mechanic indicated this has been a common problem and there appear to be a couple upgrade kits that use non-metal flywheel spline gears. Does anyone have experience with this problem and best fix?

[Schoen Fitzgerald]

Interested. Don't like hearing that. I also have a 92 F310

On Wed, Jul 20, 2016 at 11:16 PM, LngTmSlr <clyde....@gmail.com> wrote:

I have a 1992 Beneteau First 310 with 1750 hours on a 2000 series Volvo Penta engine and transmission. While motoring steadily at a moderate speed, the boat suddenly slowed and there was a Rrrrrr sound. Long story short, the spline teeth in the flywheel adapter failed completely. The splines on the transmission shaft were worn down several thousandths and some were triangle shaped. A mechanic indicated this has been a common problem and there appear to be a couple upgrade kits that use non-metal flywheel spline gears. Does anyone have experience with this problem and best fix?

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[LngTmSlr]

Update: The flywheel has a 4 Inch plate bolted to it called the drive plate that has the spline teeth that failed. It was clearly a wear issue and it damaged the transmission shaft splines as well. I ordered the replacement drive plate, Volvo Penta part #22562311, which is still metal but a modified design. The shaft damage to the transmission is causing replacement of the entire gear set. Parts seem to be available but are not cheap. The only way you can check for this problem is by pulling the transmission. I can't vouch for the mechanic's comment about how common the problem is. However, it is clear that Volvo Penta saw the need to redesign it.

[Schoen Fitzgerald]

Thanks for the update. Have no clue how many hours on mine but as we are inland lake sailors and the boat has always been inland lake, guessing not so many hours. Did you have any kind of symptomatic issues that in retrospect might have been an indication of a problem?

On Aug 5, 2016 2:09 PM, "LngTmSlr" <clyde....@gmail.com> wrote:

Update: The flywheel has a 4 Inch plate bolted to it called the drive plate that has the spline teeth that failed. It was clearly a wear issue and it damaged the transmission shaft splines as well. I ordered the replacement drive plate, Volvo Penta part #22562311, which is still metal but a modified design. The shaft damage to the transmission is causing replacement of the entire gear set. Parts seem to be available but are not cheap. The only way you can check for this problem is by pulling the transmission. I can't vouch for the mechanic's comment about how common the problem is. However, it is clear that Volvo Penta saw the need to redesign it.

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[Clyde Wood]

No. There were absolutely no mechanical warnings or noises.

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[Clyde Wood]

The delay in update on this story is due to Volvo-Penta Marine 's inability after a month to provide an ETA for the new gear set. Further, the new drive plate kit they sent has plastic inserts for the bolts that are drilled oversize (bolts are 1/2 inch, plate is drilled at about 5/8 inch, inserts are drilled larger than 5/8 holes in plate). It has taken more than a month to get company HQ customer service to understand the question and provide an answer. (No answer yet) I'm not impressed with Volvo-Penta at this point. Local reps have been responsive but they are struggling to get HQ to act. Meanwhile, the boat is growing seaweed and the season is ending.

[DAVID Fletcher]

Who are you dealing with. Give Sheri Moon a call at Trans Atlantic Diesel. 

Between the owner Nigel and Sheri I am positive they have the answer.

Just try em

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